I had a PTC 11 inch 2200 stall behind the 511 in my 69 Supper Bee with a GV and 3.54 gear. I built the engine for low end torque, if memory is correct I believe the cam lift was in the .456 range. Sold the car in 2015 so can’t check the cam card to be sure. This is what Ken at PTC recommended based on my build specs and it worked great with all the the low end torque the 511 made. The car weighed just under 4,000 pounds. AC, PS, PB car with bucket seats.