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Re: Old 318 with new magnum heads...yay or nay? [Re: Dakota_Don] #1180344 02/28/12 09:29 AM 02/28/12 09:29 AM
Joined: Jan 2003 Posts: 1,217 Endicott, NY B bnichols pro stock
bnichols pro stock B Joined: Jan 2003 Posts: 1,217 Endicott, NY	don the ones i have done all came out needing that length pushrod i have seen some guys say they needed longer ones etc but mine were all the same

Re: Old 318 with new magnum heads...yay or nay? [Re: 65rbdodge] #1180345 02/28/12 01:15 PM 02/28/12 01:15 PM
Joined: Sep 2003 Posts: 1,688 Marlboro, NY, USA R Rick_Ehrenberg top fuel
Rick_Ehrenberg top fuel R Joined: Sep 2003 Posts: 1,688 Marlboro, NY, USA	Quote: i have seen and heard about them being cracked, but have never heard about it being a problem. Yeah, every one has cracked exhaust seats, but work fine. Still, the all-new Australian EQ heads flow like Edelbrocks for 1/2 the price. The overall Magnum engine "package" has lots of other upgrades, serp. belt / tensioner, much better water pump, etc. Keeping the OEM (junkyard) SMPI is also easy, and an AWESOME swap. If you've gotta stay with LA heads (really bucks down), #308 castings (90-92 360) are the winners. "X" intake ports, near-W-2 exhausts. Rick

Re: Old 318 with new magnum heads UPDATE [Re: Rick_Ehrenberg] #1180346 03/07/12 10:06 PM 03/07/12 10:06 PM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	Well, I scoured the junkyard today and came home with a new set of heads. It took forever to get the 154 bolts (insert sarcasm here) off the front of the motor to release the heads, but I did get them. It was off a 1996 full size dodge van. It was the 8 lug axles (so 3/4 or 1 ton I guess).... Anyway, From the little I know they are the magnum heads. They look super clean and promising. I got the heads complete with rockers and valve covers for just over $100 bucks. I think for that price it is worth a try. What can anyone tell me about these heads? Anything I need to know? I know I need another intake manifold. I know I need new pushrods... What about the hydraulic lifters? I assume stock doesn't work, so what do I need to replace them with so I can have oiling through the pushrods? The casting on it says 302, and the rockers are pedestal mounted, so I am thinking magnum 318. Any thoughts? eightlitermopar Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180347 03/08/12 12:00 PM 03/08/12 12:00 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Intake manifold? Modification of the existing is possible. Redrilling the heads has also been done. Lifters? HT2011 Summit, $3.00 each. Sealed Power are a little more, I don't know where the Summit ones come from. Look in the parts catalog, if they use the same part number for the AMC engines they're the right ones. But generally all 0.904 lifters produced by the aftermarket will be right, unless you get a really old set. R.

Re: Old 318 with new magnum heads UPDATE [Re: dogdays] #1180348 03/17/12 12:51 AM 03/17/12 12:51 AM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	Ok, I have the heads apart and I will be reassembling them this week. Which head gaskets have you guys for this swap? MAGNUM OR LA ? I have seen online stuff say either, but I am wondering what you used and what has worked? I have the magnum felpro gaskets, but I can get the LA ones if they are better. Thanks eightlitermopar Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180349 03/17/12 12:49 PM 03/17/12 12:49 PM
Joined: Jan 2003 Posts: 3,920 n.e. pa. 6 65rbdodge master
65rbdodge master 6 Joined: Jan 2003 Posts: 3,920 n.e. pa.	i think you can use either head gasket. the only difference is the hole in the LA gasket allowing oil to pass through for rocker shaft oiling. the magnum head does no have the hole for oil so it will just block the hole.

Re: Old 318 with new magnum heads UPDATE [Re: 65rbdodge] #1180350 03/17/12 03:01 PM 03/17/12 03:01 PM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	thats what I was thinking. It's hard to figure out when google search turns up both answers. Looks like the magnum ones are the winner. eightlitermopar Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180351 03/17/12 03:13 PM 03/17/12 03:13 PM
Joined: Jan 2003 Posts: 1,217 Endicott, NY B bnichols pro stock
bnichols pro stock B Joined: Jan 2003 Posts: 1,217 Endicott, NY	i have used both this motor i have now has the magnum head gaskets

Re: Old 318 with new magnum heads UPDATE [Re: bnichols] #1180352 03/17/12 03:17 PM 03/17/12 03:17 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	The factory magnum head gaskets are pretty thick, I would use the thin mopar LA head gaskets, every little bit of compression will help a lot. The extra oil hole will cause exactly ZERO issues I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Old 318 with new magnum heads UPDATE [Re: HotRodDave] #1180353 03/17/12 07:43 PM 03/17/12 07:43 PM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	Quote: The factory magnum head gaskets are pretty thick, I would use the thin mopar LA head gaskets, every little bit of compression will help a lot. The extra oil hole will cause exactly ZERO issues Hmmm...maybe I will use the LA gaskets. I have read that some people have to use sealant or something around the holes? Should I just slap them on and torque it down? Another question, and maybe even a request for pictures. I know that using my 318 flat tappet cam with the magnum heads cause pushrod clearance issues. Does anyone have a photo of where I will need to clearance the heads so this will work? thanks! Always learnin' stuff on moparts! eightlitermopar Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180354 03/17/12 08:20 PM 03/17/12 08:20 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Use the MP or Mr. Gasket thin head gaskets, I think they're 1121G, about $20 each. You could drill and tap the oil hole and install a small setscrew beneath the deck if it bothers you to have that hole. I thought the problem with pushrod clearance was going the other way, from roller tappet to LA heads without the large holes like the 302s have. R.

Re: Old 318 with new magnum heads UPDATE [Re: dogdays] #1180355 03/18/12 01:31 PM 03/18/12 01:31 PM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	Thanks for the input guys. It looks like the Mr. Gasket head gaskets are the way I will go. After all, the bump in compression is what I like about this head swap. I also have a pushrod length tool I will use to see exaclty what length I need for this combo. At that point I will be able to see any potential clearance issues. I'm getting excited about seeing the difference this will make. Right now the motor runs good, but not fantastic. Eightlitemopar. Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: dogdays] #1180356 03/19/12 08:07 AM 03/19/12 08:07 AM
Joined: Jan 2006 Posts: 8,162 USA 3 360view Moparts resident spammer
360view Moparts resident spammer 3 Joined: Jan 2006 Posts: 8,162 USA	Do any of the available SB head gaskets have a 4.000 bore or are they all 4.060? Anyone have "real world" compressed thicknesses for the various head gaskets?

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180357 03/19/12 11:00 AM 03/19/12 11:00 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: Thanks for the input guys. It looks like the Mr. Gasket head gaskets are the way I will go. After all, the bump in compression is what I like about this head swap. I also have a pushrod length tool I will use to see exaclty what length I need for this combo. At that point I will be able to see any potential clearance issues. I'm getting excited about seeing the difference this will make. Right now the motor runs good, but not fantastic. Eightlitemopar. I used these .028" thick Mr. gasket head gaskets on mine 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: Old 318 with new magnum heads UPDATE [Re: patrick] #1180358 10/20/12 12:42 AM 10/20/12 12:42 AM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	This is an update from last spring. I decided to wait to pull the motor until this fall. We took several family road trips over the summer and it ran well. I now have the hunk of grease out of the car. The drivers motor mount is completely separated! I have the magnum heads and intake, now I just need to break into the motor to see what lurks underneath. Since this motor does not burn ANY oil and it has good power, I don't plan on doing fresh rings unless someone can really convince me otherwise. If I am going to dump a lot of money into something, I will go with a true magnum motor or a big block. During this "freshen up" I plan on replacing: 1) All gaskets 2) New Water pump (to go along with a new radiator since the stock one is starting to leak) 3) New Oil Pump 4) New Camshaft : The cam now is visibly worn on the lobes 5) New Timing Chain. Anything I am missig here? Any suggestions? Anyway, that is my current update if anyone is interested! eightlitermopar 7428190-June2012002.jpg (326 downloads) Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180359 02/16/13 09:32 PM 02/16/13 09:32 PM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	Here is some updated progress for anyone who is interested. I'll be ordering the pushrods soon, then it's almost done! eightlitermopar 7590991-engine001.jpg (200 downloads) Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180360 02/17/13 01:56 AM 02/17/13 01:56 AM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	Looking good! You may want to mock up the alternator and see how it fits. I'm running a LA 360 with Magnum heads... Front of the motor is off the original '68 318. I'm running a later model "square back" alternator, and it was necessary to grind the front end of the passenger Magnum head for the alternator to fit right. If you are using the '69 style alternator you may or may not have this problem, but easier to check and remedy before the engine goes back in. Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

Re: Old 318 with new magnum heads UPDATE [Re: GO_Fish] #1180361 02/17/13 02:14 AM 02/17/13 02:14 AM
Joined: Mar 2005 Posts: 1,630 North Central Florida E eightlitermopar OP top fuel
eightlitermopar OP top fuel E Joined: Mar 2005 Posts: 1,630 North Central Florida	Quote: Looking good! You may want to mock up the alternator and see how it fits. I'm running a LA 360 with Magnum heads... Front of the motor is off the original '68 318. I'm running a later model "square back" alternator, and it was necessary to grind the front end of the passenger Magnum head for the alternator to fit right. If you are using the '69 style alternator you may or may not have this problem, but easier to check and remedy before the engine goes back in. Thanks! Mocking up the front of the engine and components is next, as I am waiting for a pushrod length checking tool and a solid lifter to get here. If I may ask, what length pushrods are you using? Hydraulic lifters? I didn't think it would be so complicated to determine what lifters to use... eight Mopar or no car

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180362 02/17/13 11:58 AM 02/17/13 11:58 AM
Joined: Jan 2003 Posts: 1,255 Columbus, GA Michael Ecks pro stock
Michael Ecks pro stock Joined: Jan 2003 Posts: 1,255 Columbus, GA	Quote: Another question, and maybe even a request for pictures. I know that using my 318 flat tappet cam with the magnum heads cause pushrod clearance issues. Does anyone have a photo of where I will need to clearance the heads so this will work? Did anyone ever chime in on this. I've got a similar swap planned and I'm eagerly watching for updates on your set up to help figure mine out. What are you planning on using for valve covers? IIRC old style LA covers won't clear the magnum rockers without modifying the baffles. "The happiness of your life depends upon the quality of your thoughts" ~ Roman Emperor Marcus Aurelius

Re: Old 318 with new magnum heads UPDATE [Re: eightlitermopar] #1180363 02/17/13 02:47 PM 02/17/13 02:47 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	Quote: Quote: Looking good! You may want to mock up the alternator and see how it fits. I'm running a LA 360 with Magnum heads... Front of the motor is off the original '68 318. I'm running a later model "square back" alternator, and it was necessary to grind the front end of the passenger Magnum head for the alternator to fit right. If you are using the '69 style alternator you may or may not have this problem, but easier to check and remedy before the engine goes back in. Thanks! Mocking up the front of the engine and components is next, as I am waiting for a pushrod length checking tool and a solid lifter to get here. If I may ask, what length pushrods are you using? Hydraulic lifters? I didn't think it would be so complicated to determine what lifters to use... eight I put mine together several years ago when the MP push rods were still available. They are a little noisy, but no problems to this date. I had no push rod clearance issues, but I did check it when it was on the engine stand during assembly. I have stock '68 318 valve covers bolted to the Magnum heads, no clearance problems or modification required. Last edited by GO_Fish; 02/17/13 02:49 PM. Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

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