I briefly had an '83 Toyota Pickup with a bad 22R. I was going to swap it with a 4.3 Vortec V6, but, as expensive as it would have been, I ended spending the money on my 96. The originaly plan ws to sell the 96, modify the 83 to a wicked off road machine and buy a Supra. That was the plan...
I sold the 83, kept the 4Runner, modified it, bought a Ford Escort for commuting, and here I am. Now I've got a good off-road machine with near Supra power.
I can offer a great link to a company that specializes in engine swaps:
Advance Adapters
I ordered manual from them when I had the 83. Very detailed, and it tells you everything you need. Very nice.