torque is really important coming off a turn.RPM dont have anything to do with the diff of a 350 and 305 its the pistons heads and cam "soft cam" but since im changeing all that ecept the heads and getting it borred to 4.000 its like a 350 with a crapy 2 bolt main.i have a ? is it normal for a crank to rub against the main caps and block im not sure? whats wrong with racers firbird?we got just as good of cars as you do just a little modified and i have a semi hot rod to 76 camero so im not just a race car driver