My car with me in it weighs roughly 3600 lbs. I ran 120 mph in the 1/4 a couple years back on the old motor. According to one of the online hp calculators, that was about 500 rwhp. I dyno'd it, but it didn't run right and only made 438. So I'd say you could run about 120-122 mph, but et is gonna be more based on 60' time. My 120 mph run was only an 11.61, with a 1.9 short time. Had that been a 1.60, I would have run about 11.16.