Good running used engines are too easy to come by for me to put much work into an existing engine unless the rest of the car was outstanding and I wanted to bring the engine up to specs and keep the car. I would find an engine, replace all of the easy seals down to the manifold gaskets and install. That would be a good time to deal with any transmission leaks, B2 or anything else you can think of.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.