Welcome to the site. The motor and transmission from the Lincoln can be used for your swap. You can use the engine harness, the tranny harness, and some bits and pieces relating to making everything work form under the dash. I am certainly not the wiring guy, but there are a couple on here that are good at that kind of thing. The answer to the wiring question also depend on what year the donor car is. As for your freeze plug, a pushed out freeze plug is never a good sign, but it does not mean your engine is junk. No one on here will really be able to tell you if the block is cracked, although there are ways to pressure test the water system to see. You can make some educated assumptions based on the condition of the oil, spark plugs, etc. Dig in and make yourself at home. Post up some pics when you can.
