Decided on through the bottom...quick DIY, BillBoost style?Not really..it's tight as a mother in there. So you grab the wiring harness out fo the interior (there's a connector) flop that football box that the pcm is sitting in onto the motor. Undo the cables/hoses etc and exhaust. Then pop balljoints, undo rack from subframe and lower it all out the bottom.
Have some jackstands about 18" up if you can to hold the subframe. Then it's swaparoooni and try to get it all aligned to get the body back on it. I had a super HD 4 wheel dolly that I brought to my buddies place. Literally it was able to hold the subframe with full drivetrain on it and we'd slide that out of the way. Then if the car had to be moved..we'd put the front of the car on the dolly and roll it that way.
How great of a deal? I planned in drilling and tapping the current motor next spring. But if your deal is great enough I'd consider taking it off you hands. It's a "9" code right? And not a Y?