On my Ford 2.9 EFI, there are 6 wires total that I have to trace through the harness and take with me when I move it into the Zuki. I haven't gotten that far yet, since I'm waiting to complete my suspension mods before I start moving the engine over. The folks at Wild West are about to start a 2.9 project, give them a call. (360) 264-5363
I mean really, if yer gonna do the 2.8, it makes perfect sense to do the 2.9 for the EFI and durability.
Some immediate perusals:
You'll need the tranny bell from an A4LD tranny, a c4 tranny with the rear shaft from the c6 (find 68-73 E-150 or F-150). You'll also need a radiator from a 64 Falcon (or equivalent size). The stock radiator from the Ranger and Bronco II with the 2.8/2.9 is too deep. You will also have to relocate the hood latch or remove it completely and use Jeep type exterior latches or the likes for the radiator to fit right up against the grill.
The 2.8/2.9 sits right up against the firewall, but the stock t-case only moves back about 1 1/2". So depending upon how much suspension lift you end up with, you may need only some spacers on your stock rear d-shaft. The intermediate shaft is slightly modifed on one end to receive the tranny output on the c4, but it basically bolts right up.
That's about all the major stuff I can think of from the top of my head, but it is really a relatively easy swap and great power/weight ratio. You can gear it down way low like the "low gear" types preach, or you can leave it high geared and "muscle" yer way through mud if yer that type.
I'm choosing the middle ground, going with stock diffs and 4.16 t-case.
Hope this helps.
Neal the Zukiguy