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Bronco Motor Swap

857 views 10 replies 7 participants last post by  94stepsideford 
#1 ·
Was wondering if anyone could give me some pointers on swapping in a 89 Mustang 5.0 motor into a 70 Bronco. More specifically about what you did with the wiring harness ect. The Bronco has a NP435, and from what I understand the Motor mounts and Transmission should bolt up. Any adivce/input would be greatly appreciated.
 
#4 ·
Check out http://www.fordfuelinjection.com/ if you want a simplified harness that eliminates alot of the extra junk. It will also be real clear on which wires to tie into your stock harness..

Hit classicbroncos.com and broncofix.com for some good EFI info as well. Its a real common swap and well documented. I put a 351 lightning in mine and then converted it to mustang mass air and its all wired in nice. I think this winter Ill upgrade to the FFI harness in order to clean up a bunch of stuff...
 
#6 ·
Tons of good diagrams have been posted here, we can dig them up when you get further in the project.

The stock harness works great, you are only hooking up about 5 wires from it, the rest of them plug in, no need for an aftermarket harness.
 
#8 ·
Many hours worth of reading here that will help you:
http://www.pirate4x4.com/forum/showt...highlight=totw

I just finished swapping a 5.0 out of a 92 Mustang into my cab truck. Here is some info I have saved:

There are two suppliers (Painless and RJM Technologies) selling ready to go wiring harnesses for about $500. Another option is to buy the Ford Racing harness from Summit racing for $210. There are three parts to the 5.0 harness. The engine part, the main harness that connects the computer to the engine and to the car, and the O2 sensor harness. The Ford racing harness is only the main harness, and it requires cutting a few plugs off and wiring into your vehicle. I decided to modify my stock harness. Here are some links:

Start here to learn 5.0 EFI:
http://fordfuelinjection.com/

Wiring and vaccum diaghrams:
http://www.veryuseful.com/mustang/tech/engine/

Belt routing for eliminating the smog pump:
http://www.fordmuscle.com/archives/2...lt/index.shtml

RJM technologies harness:
http://rjminjectiontech.com/

Ford Racing harness at Summit:
http://store.summitracing.com/partde...5&autoview=sku

Painless harness at Jegs:
http://www.jegs.com/webapp/wcs/store...46169_-1_10409
 
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