Mitch, for what it's worth my 1980 stock truck engine has a chamfer also. Please correct me if I am wrong but won't the increased compression height and lack of dish help some with compression? Mitch were the pistons that came out of the engine chamferd? Another question that hopefully someone with more knoledge than me can answer, does a chamfered edge kill off quench even at 0 deck height? Jay 6155