had an chrysler 440 compression article...500 hp engine
500hp at 11.1c.r
486 hp at 10.1
460hp at 9.1
440 hp.8.0
but ill think with stock pontiac heads raising compression give even more gains...cause of the smaller efficient runners.... one example take a 70 400engine with stock 330hp gross with 067 cam with unrestricted carb it has 350-360 gross hp this engine should put out at least 310 net Hp vers a 71-72 400 with 300 grossHP with 8.2cr, 067 cam we know has a offical rating of 250 Net HP so the jump from 8.2 to 10.2 nets 60HP
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