Ok I've got two trucks right now, the first is the 87 in my sig that is the frame and body are completely effed up from crashing into a barditch, but the 302 in it only has 25K on the rebuild if that. I am in the process off getting a 1991 F150 300/M50D. The 300 is trashed it got way overheated and who knows what else, his crackhead girlfriend borrowed it, and its never ran since.

I know the bellhousings are the same, and that I will need the motormounts from the 87 to work, but what all wiring am I going to need to move, because the wiring harness on the 87 that has the large plastic connector that connects to firewall and then spiders everwhere else has been robbed for another project. So will the wiring on the 91 work? or do I need to trackdown another harness? Also I know I need to swap the comp but where is it?

If ya'll know any other tips or advice please do tell, I need a truck that can get good mileage (my 88 diesel which is my DD only gets 12 mpg), and this 91 is a single cab shortbed with 5spd and a 3.08 rearend, so it'll fit the bill if I can figure out how to do this swap

 

Come surely someone has done this swap before