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Old 10-21-2020, 01:12 PM   #5
The Rocknrod
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Location: China Spring, TX
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Re: 1974-454 What "Mark" do I have?

Quote:
Originally Posted by BigRandy View Post
Wikipedia lists BBC stats and GM product designations for passenger cars but I can't find a product code for those used in half ton trucks, specifically the 454 used in the C10 from 1974. ...
This article says it was used in 74 on commercial trucks - https://itstillruns.com/1974-gm-big-...s-7630732.html
The block should have a stamped number on the front of the passenger side head, might tell you more.
Hagerty shows a 454 in a 2 door stepside longbed for that year though so who knows?
You could go to the GM Heritage Center and download the 1974 Chevrolet Trucks booklet to find out - https://www.gmheritagecenter.com/gm-...tion-kits.html
It shows on page 23 of that PDF document that the C10 had a 454 option code #LF8. With a whopping 230HP advertised.

Last edited by The Rocknrod; 10-21-2020 at 01:27 PM.
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