The Cadillac mounts require that the motor mounts be moved forward a couple of inches on the frame. You will also have to swap oil pans, an Eldorado pan or a 425 pan will work. That's pretty much it. It isn't difficult at all. Go to this message board, you'll get more help than you need:
http://members.boardhost.com/BadCad/. Also, if you need any parts for this swap, Al at MTS can set you up (oilpan, etc). He hosts the message board. There is a link at the top of the message board that will send you there.
