Cam change?

I've not had the priveledge of running that one myself, but I can tell you Herb McCandless claimed that cam will make more power than any other flat tappet cam at the time it was introduced. I guess more infirmation is needed here, though. What gears and converter, transmission, and vehicle. Also, 400 or 440 block and what rod legnth?
69 dart, 2855 race wieght, 400 based 512, 727 with 5500 convertor dana 60 with 4.10 gear