1965 425 with 1968 455 c heads

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Mar 4, 2010 | 01:46 PM

425cutty

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Joined: Mar 2010

Posts: 33

1965 425 with 1968 455 c heads

I was just curious i just purchased an 1980 olds with a 425 and i was in the process of rebuilding a 455 and all i had done were the heads would the 455 heads bolt on the 425???

Apr 30, 2010 | 02:38 PM

olds425

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Joined: Mar 2010

Posts: 302

Yes they will. They should work perfect. No modification necessary.

May 1, 2010 | 07:01 AM

joe_padavano

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Joined: Mar 2007

Posts: 50,802

From: Northern VA

Quote:

Originally Posted by olds425

Yes they will. They should work perfect. No modification necessary.

The only possible issue might be pushrod clearance, depending on the lifter bank angle of the 425. If it is a problem, simply opening up the pushrod holes in the heads solves it.