The important question is "What engine is in each vehicle"
If they both have V6's the bellhousing bolt pattern will be the same.
I *think* the same is true of the 4 cylinder engines (common bolt pattern) but I don't know that for sure.
The newer A4LD will be at least partially computer controlled whereas your '87 BII does not have any computer control over the tranny at all.
Again, I don't know about this, but I'm thinking you're going to need the transmission, tranny computer, and any applicable wiring harnesses associated with the TCU.
Hopefully someone who knows more than I will set you on the straight path to ford enlightenment!