Well first my motor was similar to yours..with a crane hyd roller 509 lift..and I guess my combnation was ready for more cam..I sent my cam to bullit and after their regrind to 530-530 I honestly picked up almost 5 tenths with no other changes at all!!!went from 12.98 to 12.50..from 105 mph to 107 mph.. thats the fact ,,3700 lb car as aero dynamic as a brick..