HAAHAAHAHA. Thats a very damn good question , I believe the white rs just put down 660 whp on his mustang dyno , and the black drag car put down somewhere around 880-890 if I remember right on his dyno. Just for comparison sake , around 200 hp difference and bout 20 mph difference in mph , it seems bout right
But I would think there is still some more power to get with the 42R setup. Maybe it needs the F.P. HTA treatment