Engine swap

[Tara Sinift]

I have a 1988 Comanche and a 1989 Comanche both have the 4.0 motors. Are they the same

[89 MJ]

The engine is, the wiring is not. 87-88s have a C101 connector and a different ECU. I’m sure there are some other differences too, but if you are just swapping engines and not the wiring, it will all work. 

[scaleless]

However the wiring harnesses do swap and swapping to get rid of the C101 is pretty popular.  The 89-90 ECU swaps too and also has a different fuel curve that gives you a little more horsepower.

[Tara Sinift]

Thank you!