I went out and found an 82 300SD donor vehicle, but it's not exactly in good shape itself. $500, engine seems to leak more oil than mine did, and (surprise, surprise) the oil cooler line is nearly sliced through

What are the steps from here?

1. Buy the rusty, broken tie-rod, bad-brakes vehicle and try to fix it up with all the parts from my car
2. Buy the other car and get a specific part or parts replaced on my old engine... any ideas what this would take?
3. Get the whole engine from the new one dropped into my existing vehicle

I've obviously got no business trying to do any of this myself, so if you have experience with labor costs, let me know (I'll do a search on the forum, too). The 82 is similar enough to the 84 non-California engine, right?-- it looks pretty much the same under the hood.

Thanks everyone,
Brian