I done some rough math when I put the heads on over a year ago. I think 9 to 1 or less was my best guess.
It would run on 87 with old cam.
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 1970 amc rebel 4-door, faded blue paint,290 emblems on car, 455 under the hood.Turbo 400,3.15 gear.
Best so far 1/8 et,8.90 on street tires,
Since that I have added 400 heads.
I call it a rat sleeper.
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