I bought a crashed 89 si with a built d16a6, bored .20 over, high compression piston-rods, aem fuel rail, rc 310cc injectors, j&g cam, lots of other nice mods like koni shock and nuespeed springs.
My questions is what problems am i gonna run into swapping that motor into my 91 dx hatch? can i use the si wire harness? i heard im going to have to modify the dx harness, if so what do i have to do?
thanks for anyones help in advance.

 

http://www.fourthgenhatch.com/mpfi.html
Do what it says there, then putting the motor in will be cake.