[quoteUsing the wallace calculator and IVC 74.5 degrees atdc gives a dynamic compression ratio of 8.36:1.




8.36 should be safe with pump 91, correct? Quench is .040, alum heads.

Thanks!!!!!

72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.