what some of my favorite tools are, are my two and only snap-on wrenches the one that is very important is the 12mm 13mm combination wrench. it is flat and straight ( not angled like other combination wrenches) and i specificaly bought it to take off the engine fan. it was $32 but well worth it. with that taking those fan nuts off are super easy :D other than those i keep about two of everything and sometimes three. oh and pullers those are a must have item. welder comes in handy (TIGs are good) grinders saws. a metal lathe and mill :P hehe! then your standard cherry picker for those engine swaps and an engine stand.