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Re: 400 in the 68 Chevy
will vortec heads work on a 400SBC??, not for sure if you can drill steam holes in those heads? you might want to research that a little bit
also compression ratio will also depend on the Combustion chamber size of the heads you are going to use
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Mike
72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider.
421 SBC / TH350 3000RPM Stall
Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks 
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