Funny you said this, i ran 10.8/10.9s with my 451 & never got around to installing the roll bar i bought for it lol, when i sold the car, the new owner installed it, car ran faster (mph anyways) & he was 150 heavier then my scrawny azz, don't sweat haveing a roll bar, i should have installed mine, even without it, once they saw the car run, any talkers would shut up & wouldn't line up with me roll bar or not, if you "really" want a 451, then build it!!