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Old 10-23-2020, 08:22 AM   #11
Warrens69GMC
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Join Date: Jan 2003
Location: Safford,AZ
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Re: 1974-454 What "Mark" do I have?

Quote:
Originally Posted by Tom View Post
No, he had oval port heads like any 454 from 1974 should have including yours. Peanut ports were 80's.
Started in 1975
346236.....75-87...oval...OPEN...454, 120cc chamber, 225/116cc ports.

So if that was a late 1974, it could have peanut ports, which IMO isn't a bad thing
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