Yes it will. Water pump may be different so you might need to take that with you if you take the pulleys from the newer motor.
The main difference will be whether or not the cam is a roller cam. Aside from that the blocks etc will be functionally identical.
Thaks for all the info, I never even thought about the knock sensor, and for sure the motor is an 83.
Thanks to everyone who replied through the e-mail as well.
If I get around to working on my T-bird I'll post some pics, but for now truck first...