Welcome to the forum! I know it's been done before, I did a little Google search for you, and found TONS of pages... get ready for some reading!
http://www.peachparts.com/search.htm?cx=015238323195528004774%3A_wneywo5nvm&cof=FORID%3A9&q=engine+in+Jeep&sa=Search&siteurl=www.peachparts.com%2Fshopforum%2Fshowthread.php%3Ft%3D297239#892

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!