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Old 07-26-2012, 01:33 PM
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de-stroking a 350 to a 327

alright i have a 4 bolt main 350 chevy with the newer style rear main, if i wanted to turn it into a 327 how could this be done?

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Old 07-26-2012, 01:43 PM
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Maybe one of the new 327 (5.3l) cranks will fit?
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Old 07-26-2012, 01:45 PM
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You must be the first person to ever consider putting a 2pc rms crank into a 1pc rms block! I wonder if that idea is truely unique?

If only there was a website where you could some how SEARCH for such information that someone else had already put on the internet...
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Old 07-26-2012, 01:48 PM
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If small journal 327 crank. Childs&Albert (King) adapter main bearings. If large journal 327 crank, bolt in. +One piece seal adapter available everywhere.
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Old 07-26-2012, 01:52 PM
How fast is fast enough?
 
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Maybe one of the new 327 (5.3l) cranks will fit?
smh
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Old 07-26-2012, 08:22 PM
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The easiest way is to find a crank from a chevy 307 which shares the same stroke as the 327. You will however need to have it balanced to be used with heavier pistons due to the larger bore. There are 1 to 2 piece rear main seal adapters that sell for a little over a 100 bucks which makes the crank a bolt in.
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Old 07-27-2012, 04:56 AM
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Why? Seems like a lot of work and money to make less power.
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Old 07-27-2012, 06:24 AM
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I was going to do a 307 crank into a 350 block and use KB hypers as the lighter counterweights, but as said other than a bit more whine you aren't gaining over a 350. I went 454 and 383 small block instead
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Old 07-27-2012, 03:52 PM
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Originally Posted by ap72 View Post
You must be the first person to ever consider putting a 2pc rms crank into a 1pc rms block! I wonder if that idea is truely unique?

If only there was a website where you could some how SEARCH for such information that someone else had already put on the internet...
I bought a block from Wheeler Performance in Jacksonville. Late model 350 converted to 4 bolt main with 2 piece rear main seal. Nice job. Use internally balanced forged crank and early flywheel. Solid lifter cam and World cast iron early heads and Edelbrock intake.
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Old 07-28-2012, 03:02 PM
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With all the good forgings around today, it's hard to believe there aren't MORE 327s and 331s being built. I agree, 350 and 383 make more power. But even in my Pontiac customers, I get the odd "I want to rev the snot out of it!" type. I've learned, people want what they want because they want it. Period. And if you want a revver, it's pretty hard to argue with a a 327 Chevy. The factory 327 is the reason the small block is the standard by which most are measured, especially "smaller" engines. IMO, beyond 383s, it gets a little "stretched", and while still powerful, not as tough.

I don't think I'd use a 307 crank, though. Cheap, but for a reason. Nodular cranks are okay for lower revs and HP numbers. Higher revs demand a forging. The 5.7" rod is ideal, too, with the 3.25" stroke. 6" rods should only be considered for high-speed engines (circle track, flying mile, etc.). Street and drag engines like the 5.7".

With today's heads and bottom end parts, there's no reason you can't build a monsterous little motor. Gear it down and rev it up!! If that's your idea of fun, that's what you need to do. For "pounding", not many better than 327.

Jim
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