fast to me is what ever you are content on running. like a 318 in the 12's or 13's , its a what 318, yes thats fast, a stroked 440 with 13.1 and alumium heads, and tubbed, running 12 or 13's, still fast but not as impressive, but if who ever owns it is happy with it thats all that matters. theres 3 kinds of cars to me #1 a race car is all race and no street driving, none #2 is an old hot rod, a tagged an insured street car with a hopped up motor that you might have to mix racing gas with sometimes or not, and take it to local cruise ins or for joyrides including burnouts, then # 3 a mostly stock car fixed up pretty nice that is pump gas only, drive on vacation or anywhere you wanted with no worrys and no constent tuning every week to drive on the weekend, get in and go, so when you ask what fast is you have to decide what you want to build and what you would enjoy the most because different types of combo's have different fast time slips, its what makes you happy8)