[drewski86]

What kind of budget do you have and what kind of power are you looking for? If you're unsure about power, what do you want to do with the car?

Physically getting the motor in the car is the easy part. You need a mount and a 1st Gen front cover tapped for oil return as stated above. Since you have the car and I'm assuming the front cover on the 12a, slot the holes on the 12a mount and pick up a GSL-SE oil pan for less than $20 used (I would suggest a oil pan baffle also for another ~$50) and now the motor is in the car. Or you can use the racing beat conversion mount($96), or do the Re-Speed cross member which will give you ability to use a mustang rack and pinion if you want($399-$850).

Then you have to either make a mount for either the REW tranny or a 2nd Gen TII tranny. You will also have to have the drive shaft modified with the correct yoke for the tranny. Expect to spend a couple hundred dollars here.

There are other things that need to be done(ecu, cooling, exhaust, clutch, etc.), but it all depends on your budget and power goals. Also the more work you can do yourself, the cheaper it will be.