Don't forget the front cover seal. Get a portable hi-pressure water blaster and clean not only the engine but the engine compartment. Check all the wiring for hardened wires and cracks. Same with the vacuum hoses. Install new transmission cooling lines. power steering hoses, perhaps brake hoses, check fuel and brake lines, replace fuel tank strainer, check the drive shaft center bearing, install 2 new bushings in the trans. shifting linkage ($0.75 each), take the radiator to a radiator shop and have them flush/rod it out, check for acid/rust damage under the battery on the wheel well (good time to fix it), check and lubricate the throttle and shift linkage, get the injectors pop tested, check the glow plugs (its not difficult to check them in the car but it is much easier when the engine is out), the list goes on.