I have a 461 (400 + .030" with a 4.25" crank) with 9.5 to 1 compression (6X-8 heads with a .060" cut), .040" quench, zero deck with flat top pistons with a 041 clone-cam that is pretty rowdy at idle. It still makes amazing torque just off idle, so no problem roasting the tires and making vacuum for the power brakes. I wouldn't go less than 9.5 to 1 static compression on any 455 if you're considering a RAIV style cam.
Dennis
|