I'm building a 327 now. I have three books that I'm studying. How to re-build a SBC, How to hot rod a SBC, and Bill Jenkins book on building a SBC. What I have learned: Check the clearances for the crank and rod bearings, piston ring gaps, and thrust bearing. If these aren't right the motor won't last long. It might be over kill, but I like to polish the oil return areas inside the block. Safety wireing internal bolts and screws can't hurt. I've had bolts back out of a ring gear and my exhaust manifold.