to add to Jeffs comment, more torque means a sweeter running low rpm motor. My choice would be as big a stroke crank as will fit in my oil system plans. Do a search on what will fit if you plan on an internal (stock) pickup. 4.375 might clear , but i am not sure. Cam choice should match the restrictive intake and exhaust, focussing on torque. It may be best to go custom on the cam, and it may be as tame as 228 at . 050 and less than . 500 lift. The end result should be like a stock 440 on steroids! Brutal torque, shifts at or below 5000 rpm. FUN!