I have a 82 Odyssey RV- which is basically an 82 PU with a 1 ton axle. I recently damaged the engine to the point of a full rebuild. I am cheap and lazy, and the RV is so old and rarely used (but still loved), that I don't want to rebuild. I have a used engine available with around 180k that was in a rollover and is undamaged. But I don't have any other history. But if I drive 20,000k in the next ten years in the RV, I'll be surprised. I am not a total newbie, but I have never done anything more inside an engine than minor valve adjustment. But I can follow directions and have rebuilt the carb, rear axle, and brakes, in addition to swapping out the alternator, starter, and other parts and putting in a new wiring harness. I have also replaced the timing belt, steering gear, rear dif, starter, alt, and ball joints on my 91 (3.0) just to give an idea of my experience.

So here is my question: to try and get a little life out of a used engine (i know its a crapshoot without a rebuild) what should I do while its out of the vehicle?

My list so far:
timing chain
Rear seal
oil pump?
Valve cover gasket
Head gasket?
Water pump

Incidentally, I was already planning on doing the clutch before this happened, so that's in the plans, too.

Spray me down on what I am missing, but I again, this is going into a rig that looks like a poorly kept mobil meth-lab, and is falling apart in so many other ways, so don't hurt me too badly.

Thanks

Well, if you do the Timing Chain (and you certainly should) you should be replacing the water pump, oil pump, and VC gasket anyway. Replacing seals, etc. that are only accessible under such circumstances is also a no-brainer.

The stock 22R head can be used with 22RE intake (if it’s an ’83 and later head), so there’s no need to get an EFI head unless the head you’re using is an early 22R head, in which case you’ll need to drill and tap three new holes or use the donor EFI head. Most of the things you will need are either on the intake or plugged into the harness, so make sure you get everything that plugs into the harness.
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Tips: Always Check the Rocker Arm Oil Restrictor