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413 RB information??? HELP needed

Posted By: chrisnben

413 RB information??? HELP needed - 09/14/08 06:23 PM

Hey guys- I picked up a super clean 413! It is a RV motor built 4/71. Came complete top to bottom with only 60K miles or so. Air cleaner says 265 HP. Has the HUGE water pump and exhaust manifolds. This engine gets the "most cast iron" award! I am assuming the torque to be around 450-500 FT Lbs.? Can someone give me a website or two for other specs on the industrial/ motorhome engines. The RB pad says GT 413 and a letter "D". The heads are a 2899943 or 948- can't quite tell on the 3 or 8. I have never heard of these castings. Any help would be great!!
Posted By: John_Kunkel

Re: 413 RB information??? HELP needed - 09/14/08 09:56 PM


GT 413

G= Year code for 1971
T= Truck
413= Displacement
D= ?

2899 943 is the correct head casting number for the '71-'77 truck 361/413.
Posted By: dOc !

Re: 413 RB information??? HELP needed - 09/14/08 10:13 PM

A project that I am working on ... but I plan on USING those 943 heads - with some heavy mods and flow-work. NOT to increase flow but to change to as much as a swirl as possible.

First - those heads are virtually "dead" after 4,000 rpms. But they weren't designed for anything more than that.

What specific info are you looking for?
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 10:32 PM

What do you want to know? Have a '72 413 that's being converted to street use, was going to stroke it, but parts are falling into place to build it as a 6-71 blower motor....

The heads are closed chambers, I had to magnify. the number to read and couldn't find a thing about them, not usable for what I was doing so they sold!

Attached picture 4685725-rsz_413_018.jpg
Posted By: chrisnben

Re: 413 RB information??? HELP needed - 09/14/08 10:34 PM

well, probally will sell the heads and put on some 906's I have. waiting to see if I can bore this thing .070 so I can use a 4.25 KB piston and still be streetable. Anyone want to buy (cheap) the exhaust manifolds and heads and intake??
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 10:34 PM

Chambers....

Bye Bye!!!!!

Attached picture 4685732-rsz_413_015.jpg
Posted By: chrisnben

Re: 413 RB information??? HELP needed - 09/14/08 10:37 PM

I should just ebay all the stuff. Maybe someone with an RV or toy hauler can use 'em.
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 10:39 PM

Quote:

well, probally will sell the heads and put on some 906's I have. waiting to see if I can bore this thing .070 so I can use a 4.25 KB piston and still be streetable. Anyone want to buy (cheap) the exhaust manifolds and heads and intake??



I got $50 for the heads and pump...Glad to get it... The Rockers are useable, the PR's and bolts are not Send them with the heads!

Attached picture 4685746-rsz_cars_038.jpg
Posted By: dOc !

Re: 413 RB information??? HELP needed - 09/14/08 10:41 PM

Quote:

well, probally will sell the heads and put on some 906's I have. waiting to see if I can bore this thing .070 so I can use a 4.25 KB piston and still be streetable. Anyone want to buy (cheap) the exhaust manifolds and heads and intake??



That block should go 70 ...EZ.

Define "cheap" !!
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 10:41 PM

Yep, ebay, sold my stuff to a guy with a Travco! he was and so was I
Posted By: chrisnben

Re: 413 RB information??? HELP needed - 09/14/08 10:47 PM

just told 440 guy $100 for all the stuff (heads, w. pump, intake, flexplate, exhaust mannys. get it gone is my motto.
My motor didn't have a/c though.
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 10:48 PM

"That block should go 70 ...EZ."

Stout blocks, but your hunting 383 standard bore, or 426W STD, Just not much off the shelf. Custom pistons will kill the cost of the build
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 10:51 PM

Nice, good deal for both of you! Heck he could have had my stuff, I know he's really into the 413 MH motors as MH motors! Shipping was just plain prohibitive
Posted By: chrisnben

Re: 413 RB information??? HELP needed - 09/14/08 10:52 PM

I found Summit carries KB962 hypers ($250)& TRW cast #z366np ($340), both 4.25 bore- should work. I am keeping the block and crank, rods- that's why I bought it.
Posted By: dOc !

Re: 413 RB information??? HELP needed - 09/14/08 11:05 PM

Quote:




Custom pistons will kill the cost of the build



Custom pistons FERR-SURE ain't cheap ... butttt to put MY package together it might have to be an expense I will have to bear.

The last set of NEW flat-top +30 pistons I bought were about 200$. And they MIGHT NOT work with my combo since I need a higher CD and maybe a mild dome. Those 943 heads have a HUGE combustion chamber - even though they are a closed design.

R70 ... I think I might have emailed you about those parts when they were on eBay !!
Posted By: R70RUNNER

Re: 413 RB information??? HELP needed - 09/14/08 11:18 PM

Quote:

I found Summit carries KB962 hypers ($250)& TRW cast #z366np ($340), both 4.25 bore- should work. I am keeping the block and crank, rods- that's why I bought it.



Make sure they're Mopar, the valve reliefs are not correct on brand F or X.... AndyF has tied just about every way possible to use other brands pistons, with YARD SALE results!

440G.. Yep we talked, and thanks for the infor!

Posted By: chargerron69

Re: 413 RB information??? HELP needed - 09/14/08 11:19 PM

440-guy, maybe you should change your name to 413 guy
just saying
Ron
Posted By: dOc !

Re: 413 RB information??? HELP needed - 09/14/08 11:33 PM

Yeah Ron ...U R right !

I have 3 440's ....and EIGHT 413's ..and I have 4 more coming !! And one of those is going in a Travco .. that has a 440 in it.

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