when i tested compression in my brothers mustang (88 gt) bored .040 over with just standard pistons (about 9:1) and the stock heads milled .030 , he had 160 psi +/- about 5 psi in all cylinders , i think that his compression ratio was about 9.5:1 to 9.75:1 . hope this might help . sounds like you got a lot of compression .
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