The 85 is a a efi truck, my question is on wiring....will my 90 comp, plug into the 85 wiring in the cab? or what will i have to do to use the 90 efi 22re in my 85?................................thanks

 

the harnesses are different, u need the compleate wiring harness annd all the sensors and intake setup with injectors. the only thing im sure is the same is the afm, toe 90 couil ignitor is diff from the 85 one too.