replaced trans, rebuild it, swap it?

[ngarover]

My 87 300D is down again. This time for the trans. Fluid pouring out the front of it, = the front seal. This transmission has 260k on it, so it's had a good life. Even after topping it off, It's still slipping so, it's going to need a full rebuild at this point. Now, do I go ahead and have it rebuilt? I don't have the tools needed to do this job myself, and no one has a press etc to rent.

I have a 94 gas trans sitting here with no reverse and 200k on it, again, full rebuilt.

Also have a transmission out of my old 85, with a bad front pump, but was a strong trans. Could I just swap the pumps? Are they the same trans?

Or do I shop around and buy parts to to a manual conversion... which some say I may not be happy with anyways... (from some of the threads I've read of those who have done it)

Pay to buy a rebuild and send them mine back as core?

What are my options?

Car's up in the air, ready to pull the trans now.