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  1. 1964-1974 Tempest/LeMans/GTO Engine Tuning
    I'm having concerns with compression ratio limits to '69 #62 heads off a 428. So I bought a '70 400 to build and throw into a '68 Tempest. I was told the motor was stuck, but have found it's actually .30 over with new pistons, cam, timing chain, and crank. The heads are press in stud #16(I have...
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