Just bought a 340 block from another Moparts member....got tired of passing by the empty engine stand staring at me every morning as I head to work. (hope some of you can relate).

Anyway....I'm real happy with the 341" 318 but with a new set of slugs I could move the 6" alumimum rods and 3.55 crank right in there with a 260-ish Solid flat tap and make a reliable 500-520HP 7200rpm 375 incher....or I can do like everybody and their brother is doing these days and buy a 4" stroker kit and make about the same power with about 50 lb/ft more grunt and a bit less RPM. The cool thing about the 375 is I can make an off the rack 340 slug work with my combo by knocking about .014 off the top of the slugs, and if I did the math right I can get the slug to weigh the same as my old 318's and not even have to rebalance new slugs and rings and I'm swapped in and out and in an afternoon I have 34 more cubes, another point of cr and at least 50 more horses.

I just want to do another small block, I guess I'm about B/RB'ed out for a while, my next big block will be the 'funny' kind with the spark plugs through the valve covers.

The 4" stroke would be great and an easy build but I really miss the old school high winding small blocks of my youth....what to do?

I also thought about selling the 341 short block outright (already have a friend whose real interested) and maybe trying to find a 3.79" stroke and kind of split the difference.

I know people are saying just keep the 341, why change anything and I know....it's just that pulling the motor in the Rocky is actually easier than changing the plugs on my old RB motored Duster.

375

I wanted the large stroker too but didn't work out that way.

Easy, make a high winding 416 You are smart and I would be willing to bet you could do a good port job on those eddys, pop in a bigger cam and you can still make a 416 rev real nice. It might not turn 9000rpm but still would be fun and could turn 7000, plus if you invest in some decent light weight parts a 416 revs so fast compared to a 440

nothing like the sound of a 10,000 rpm small block.

I think if he wanted to turn 10,000 with a stock block it would need a pretty short stroke, not longer. Probably be best off with a 48 degree block and W8s if he wanted to do that reliably.

I would love to build one of these things..Large Bore small stroke with some good flowing heads.
I would love to jump on that set of W2 heads that Vic has/had for sale a month or so ago.
This would be killer in a Duster/Demon on the street with a 4 speed.
Heck ya wind that baby up and side step the clutch.

Well i want to limit the hp to about 525 but I would like about a 7000-7200 power peak and be able to wind it up to about 7600-7800. That's plenty tight for me. Iknow I can spin a 4" stroke up over seven but that's a lot of piston speed for a stock block.

The only thing I ever had that spun 10,000 only had 2 wheels!

OK heres a recipe for you.

build a 4.250 bore siamese bore 48 degree block with a 2.98 or 3 inch stroke (whatever the actual old T/As used) and stick a set of W9s paint i all oarnge and put a set of stock valve covers on it, spin the bejeebuz out of it, you might need some 4.56s and a low 1st in your 904 with about a 7000 stall converter I got a set of crower rods that'll work in there I'll sell you, that ought to get the rocky moving

Make that big motor rev! Good heads, proper cam and good valvetrain and it'll do it!
http://www.youtube.com/watch?v=vr_gl2cgl1o

I am a chevy hater through and through but that is a cool vid

I would like to see a stroked and poked 6.1 hemi with max ported heads and sheetmetal intake... $$$ no issue kind of build and see what they could really do NA, might not make 1000 but would still be awesome

That school opened my eyes towards engines of all makes. I still prefer the mopars but seeing what can be done with an LS motor makes me a believer lol! I'd also like to see a max effort modern "hemi" engine. I know 370 cfm out of the 6.1 heads isn't unheard of and that's a factory casting. If the economy comes back enough that these engines get much of an aftermarket, maybe we'll see some new heads with 400+ capabilities. I do know the motor in the video has a 4" stroke. Just goes to show that with good enough heads, rpm out of a larger motor is not a difficult thing to get..

I've got a Moldex 8 bolt 3.06 stroke forged crank with 318/340 mains and sbc rod journals.

I like your idea of putting together everything you have on hand, let the rpm fall where it may for power. Maybe if the need arises, spend the saved cash coming from using what you have on a rollercam!

Your "high winding" engine at 7200 isn't high rpm to me, so the only draw back to that option is the loss of torque the larger CID option will give you. So, that still doesn't change my vote, bigger is better.

Now if you had a really good set of heads to allow the small CID to rev to 8500, I would really vote against it.

I figure a power peak of 7200 and a redline of 7800 would be 'High enough' to bring back memories of the old Original w2 4 speed days of the late 70's/Early 80's when my little 340 4 speed was tearing up BBC AZZ left and right.

Getting up closer to and over 8000 reliably also takes a lot more toll on the valvetrain....and based on the sonic check #'s the block at a 4.100 bore at best is only good for about 550 so there's no point going over the top. I did all my racing in cars and on bikes back in my 20's, now in my 40's I just want to go have fun on occassion, I got too many other irons in the fire to take it too seriously anymore I hit a point where fast enough is fast enough, and high enough (rpm) is high enough to get done what I want to do.

the extra torque of the big motor would make me want to drop the gear down from 4.56's, don't really need a lot more torque with an 85" wheelbase I don't think.

Greg, I hear you on the roller and that would be sweet but our buddy Goldmember practically gave me something very close to my favorite old Ultradyne Solid, so....

I could really slip that same cam in the 341 and spin her up another 800-1000 but like I said I always had a sweet spot for those big bore 340 blocks.

Now if a set of ready to go w5's fell in my lap....

Here is a sweet deal

I have been hunting for a deal on a 3.75-3.79 crank also. Haven't run across anything. A memeber here is supposed to be having access to some soon and I'll let you know when I get any more info.

Sell what you have and buy one of the super cheap R5P7 deals laying around.

They dont make a ton of torque so you can make them stick in just about anything, and if revving gets your panties all damp..that would be the ideal thing to have for rpm's

And, you will go ultra fast also

364...that does sound sweet....now I just need $3400.00 to fall in my lap first

Seriously though another 35 cubes and 50-60 hp is mine for little more than the cost of a set of pistons and rings....tough to beat the logic of it Also I think the M1 and the 830 Annular I already have are a touch too big for the 10:1 341, it would fit a little more better with 11:1 and 375 inches.

If I got good stuff on the shelf, I'm always going to try to reuse what I have laying around whenever I can.

Bobby I wish I had your problems

Well....what did they say about the "best laid plans?"

Turns out the block I was planning to get may have some issues, the present owner (very stand-up guy!!) is gonna run it by the shop to check things out. Plan B might be go back to slip the bigger solid in the 341 and spray it with a 150 shot right after she goes into second gear.

I haven't run a nitrous motor since I played with some Mitsu turbo cars several years back, that would be fun too.

I'd keep the 341 shortblock together, personally.

how about finding another 3.51" crank, diamond 4" stroke pistons with SBC pins, and 6.4" rods. my math puts them at .012" OOTH, and a 1.82 rod ratio (similar to a stock 340's 1.84 rod ratio), which should keep piston velocity down for high winding.

cam, I guess I'd go roller, but that's me...

I'd be tempted to sell the entire 341, and maybe play with some of the RHS heads....

Hey Wize, have you run the rocky or your charger at the track yet? CHIP