yo,
As Seabronco advised so well!
Parts integration is up to time, $ and persistence as my dad used to say.
Here is an example by Steve;
1983 Ford Bronco
Mileage: 640000 Engine: 1995 4.9L from F-150, UN-rebuilt, completely transplanted twice, including computer, air filter, y-pipe, & all accessories. 130A alternator, 1996 Bronco gas tank & pump. K&N drop-in. Drivetrain: 1978 F-250 NP-435; '93 BW1356 clocked; reman rear d'shaft; rebuilt front d'shaft; '96 Bronco D44IFS with 3.07 open diff; rebuilt Ford 8.8" 3.08 open; stock F&R antisway bars & Energy polyurethane bushings all around. Notes: It has been completely rebuilt from the ground up for the 2nd time now. Most of the body & frame are '93, the tailgate is a '96, the door mirrors are heavily modified with LEDs, and the camper shell is a '96 with a '94 Explorer roof rack & '82 sliding windows. The front shoulder belts & rear seat are the original '83 parts, but the front seats are '97 Econoline power captain's chairs with heat. The instrument cluster & wiring harnesses have been heavily modified so the factory fuel reset light works, and a semi-factory low fuel light has been added. I've added AutoLamps, AutoDimming Brights, RKE, one-touch both directions for all windows, an auto-dimming compass rear-view mirror, dual visors, dual spotlight wiring, always-on PW, OBA. The CB & radar detector are hard-wired. Planned mods include a sunroof & articulated doors. The bumpers are my own design (mostly hand-built). The front includes factory trim, 2 storage compartments, 3 recovery points, a removable fold-down grille guard, & a Ramsey RE12000. The rear bumper has an integral hitch receiver & 3 locking storage boxes. Last Updated: 7/28/2014
http://www.supermotors.net/registry/2742
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If you have or foresee Emission tests in your area; consider keeping all Emission, PCM (aka, Computer, EEC, ECU) components, vacuum lines, sensors etc. intact in the the 89.