On my 440 based street/strip 500" engine, I ran right at 11:1 for years on pump gas with no problems. That was with good quench. Your cam and converter will help you. As already covered, don't sacrifice quench in order to lower the CR.

P.S. That was with aluminum heads.

Last edited by DaveRS23; 02/08/20 11:08 AM.
Master, again and still