I had a stock bottom 440 with basically stock 906 heads a 509 cam, street dominator intake, lucky if it was 9.5-1 comp (my screw up) 750 hp carb. In a 70 bee with a 4000 stall convertor and 430 gears. The car ran 12.17s all day. If the parts would have been better matched I think 11s would of ben there.