I just rebuilt a k case 700r4 transmission, installed a transgo shift kit, and a upgraded pump. Also complete replacement of drums, shoes, spring kit, wheel cylinders, calipers, pads, and rotors.
Previous blazer I pulled, and rebuilt a 95 chevy 4.3 cpi vortec v6, and did everything from oil pump, to valve guide seals, including rear main, front, and timing chain.
Currently I'm waiting on the upper and lower control arms, upper and lower ball joint, inner and outer tie rod assembly, Pittman arm, c.f. axles, hubs and bearings, and idler arm to arrive so I can completely overhaul the front suspension in my truck.
I recently rebuilt my friends edelbrock 1406 carburetor, rebuilt and regeared his 14 bolt rear diff and Dana 44. The Dana was a pain, but doable.
Installed multiple clutches in almost every vehicle I've owned, timing belts on toyotas (don't like the fwd because of the little clearance) and shocks and struts.
I've pretty much tinkered quite a bit on everything that doesn't have an insane computer brain.