cam92rs

l03
3970010 block

ok, i got a 010 block(haha, who dont) 4 bolt main, 2 pc. rms. im looking for a little more power here, so i was thinking, what would i have to do to swap out my 305 crank (1 pc rms) into the 2 pc rms block. just get a rms thats a 1 pc for the 350 or will the rear main from the 305 block work? the only difference in the blocks is the oil tubes, rms and bore correct? the block will be bored 30 over. but i was just goin to use the running 305 crank and rods. new bearing s of course. would this be ok? the heads will be upgraded (maybe redone with some 1.6 rr) and so will the tbi.but i wanted to keep it FI. i know the computer will need some tuning, but thats a different story for right now. just need to know how i can get the crank from the 305 to work with the 2 pc rms of the 350 4 bolt.

i wouldnt mind breaking into the low/mid 13's. but instead of spending money on stuff i dont absolutely need, why not reuse some of the old.

sorry if this has been asked before, but i couldnt find it, THANKS ALL

five7kid

iTrader: (14)

You lost me using "more power" and "305 crank" in the same sentence. What do you expect to gain there?

I've seen 2-piece crank in 1-piece block adapters, but never the other way around. 2-piece aftermarket cranks are more plentiful and less expensive than similar 1-piece cranks. The adapters exist for that very reason.

And, cranks don't contribute to power directly, although you can gain a couple of ponies with special counterweight shaping and coating, but you're talking about very small gains for a lot more money.

If you want to use a 1-piece RMS crank, use a 1-piece RMS block. With the exception of 1986 and a lot of '87-'94 truck blocks, you'll gain the added advantage (or option, at least) of using a factory-style roller lifter cam as well. Other than that, unless you don't have a crank for the 010 block, just use the crank that came with it.

cam92rs

the reason for the 305 crank( 1 pc rms) is becuase the other crank ( the origonal 350 2pc rms) would have to be turned, i was just curious becuase the 305 and 350 cranks both are 3.48 stroke, why not just use it while i got it. i suppose i could drop 200 bucks for a eagle 2 pc rms crank. but if i didnt HAVE to, then i wasnt goin to.i have the crank and rods from the 010 block( but the crank will have to be turned as i stated above) and i have the crank and rods from a 92 l03. see what im talking about now? why not use whats already matched? its all basically the same.right? what exactly is the difference in a crank from a (lets say oooo 72 ish 350 ) then that of a 92 crank from a 305?

five7kid

iTrader: (14)

Again, no way to do the 1-piece crank in a 2-piece block, to the best of my knowledge.

The difference between any 305 and 350 crank of the same RMS type is the balancing. If you use a 305 crank in a 350 engine, you're going to have to get the whole rotating assembly balanced - not a bad idea, but the 305 crank will probably need Mallory metal to get the job done, and there goes your cost savings over turning a stock 350 crank. Unless you use superlight 350 pistons and/or rods - again, there goes your cost savings.

Just use the 350 crank.
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Okay, I think I understand that you're trying to say you're looking for a little more power going from 305 to 350.

Right???

cam92rs

yea, the 305 to the 350 swap was the power i was talking about.. and thanks for the info. i'll just get the 350 crank turned. think the stock rods will hold up? i'll get new rod bolts and also new main bolts. i dont plan on spinning the setup past 5k. and dont plan on spending more then 500 on it( not including the machine work). so it should be decent. but im goin to be using the factory roller heads. will that cause a issue with the flat tappet camshaft and block? think i will have any problems with using 92 heads on a 70 somthing block?

five7kid

iTrader: (14)

With ARP rod bolts and big ends resized, the rods should be fine to 6k RPMs.

Okay, I'm lost again. What '92 heads? They will bolt onto the 010 block just fine. You'll need to use the longer flat tappet pushrods with flat tappet lifters. You'll need to use self-aligning rocker arms with '92 heads. You'll need to use an '87-up style intake manifold, or modify the center two intake mount bolts on each side if you use an '86-earlier intake. Otherwise, no issues.

If you're talking the '92 LO3 heads, that's not a good thing to do to a 350. It's not something to get a full-weight 3rd gen into the 13's. Would it be possible with the right work done to those heads? Yes, but it would be cheaper to get better heads.

VenomX-87

Try geting a set of "Complete Large Port Vortec Bow-tie Cylinder Heads" they are ment to be alot better than stock heads and you can get them at a reasonable price (compared to aftermarket heads). but you need a set of self aligning rocker arms, a pair of "center-bolt" valve covers and a raised runner design intake manifold.
(only said these heads because you said you got a set of 92 heads so you should already have most of the stuff you need for these Vortec heads).

Im looking in to getting a set for my 327 that i will be
installing in to my Trans-Am.

Link: http://www.eagleautoparts.com.au/25534431.htm

cam92rs

you guys are soo helpful, i love it. thanks five7kid

five7kid

iTrader: (14)

The intake manifold is the only one of those parts needed (and gaskets, of course) that wouldn't be available from the '92 engine.