So let me get this straight, you are not an idiot because you can order a bunch of expensive parts and pretty much assemble them to spec?

Seriously, what is unique about the way you build a motor? You get some lee-way on the piston-wall clearance, and the rod/main bearing clearances. And most of that is based on the most basic principals of thermodynamics: hot shit expands, make sure nothing is in its way. How many pieces of any motor you have built, did you do the r&d for? You are a common mechanic, that works in a niche market (sorry). Dont you have a LS1 swap to be fucking up?