AshtonFig

I bought a 86 comanche with the 2.5 which has a rod knock. I am willing to rebuild it but ive been reading that if your going to spend the money to rebuild it you might as well do a motor swap. What would be the easiest and or cheapsest way to go for a motor swap? I do have a 4.3 gm motor out of a s-10 that might work but I'm not sure what trans to run with it or if its even worth it to put it in. any advice or ideas is welcome