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Joined: Aug 2010
Posts: 232
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Joined: Aug 2010
Posts: 232 |
I picked up a rebuilt but never fired 400 block a while back. I finally got around to taking it apart and it has a 496452 350 crank in it. Anyone know the difference between 350 and 400 cranks? The bearing surfaces all seem to be the same. I'm guessing it's the counterweights. Are they interchangeable?
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Joined: Mar 2012
Posts: 1,538 Likes: 41
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Joined: Mar 2012
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As long as it is balanced for 400 pistons it will be fine.
Pontiac power
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Joined: Aug 2010
Posts: 232
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As long as it is balanced for 400 pistons it will be fine. Thanks!
Last edited by go2fast; 04/18/12 10:03 PM.
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Joined: Feb 2004
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From what I remember the 350 crank is missing some counter balances in the midddle. I would like to know why they did this? I would guess the piston weight was more for the 400s but that is just a guess.
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Joined: Mar 2012
Posts: 1,538 Likes: 41
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would not work if they were missing any counterbalance, the engine would vibrate itself to death.
350,400 same crank dimensions only differences are the flywheel centering hub between years.
Pontiac power
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