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Old 08-01-2020, 11:37 AM   #3
Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 6,226
Re: 1974 454 rebuild questions

It doesn't take much to wake up a 74 engine. If I am correct the factory compression was like 7.5 or 7.8 to 1. So bumping it to about 8.5-8.8 will help a lot. Cam as suggested comp 268 with a good valve job and you're done. Unless you are going to race this and spin it up to 5-6 grand all the time, just run the stock heads with a clean valve job. Both of my 454s rarely see over 4000 rpm. All the power is in the bottom end for what I use my trucks for
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