No-dice. Comp Cams 280H works great. I have a 1965 F-100 with a 428, and it runs great. Just to give you an idea of what I mean, my son and I were at Bremerton raceway (WA) last season. He was driving the truck, but due to no driveline loop they insisted that the vehicle not go into the 13's (Bremerton rule). We did not know what it was capable of. So on the brakes before the end of the 1/4 mile it ran 13.79 @ 96 mph.
See
www.forddragteam.com
Good luck.