Hi guys, I'm doing some investigating trying to decide on a head and cam combo for a shortblock that I've recently assembled, but before I can do so, I need to decide on an ideal rpm range for my application. I'm running a GM sbc 400 block, 509 casting 2-bolt with main studs. GM steal 3.480 stroke crank, H-beam rods, with forged HRC 6.7cc domes. (all balanced). My car as sets weighs in at 3200lbs with me in it. Could be anywhere from 3100-3300lbs when finished. My thoughts were to begin building power in the 4000-4500rpm range with a peak at or near 8000. Does this sound right? I'm taking in consideration that 377s don't produce a whole lot of grunt in the lower rpm range, and this heavy car is definitely going to need some help out of the hole. Is that taking this block and crank too far? An aftermarket block and crank are in my future but I'll have to settle for what I have for the time being. Please share your thoughts.