s13 car s14 engine. . . what needs to be changed out?

[nissan240det]

1992 se, im trying to put in an obd 2 ka /w manual transmission. i know this to be possible.

i also know it will bolt right up. but the wiring harness seems to be a slight bit different than some connectors on the motor.i just need to know exactly what i need to do to get it right.i have the 92 engine also, just in case i need to swap parts over to the obd2 engine but if not neccesary, than it will be more to my likeing.any help is greatly appreciated. thanks

[supracrazy12]

I might be selling a ecu and wireing harness from a dohc S13 IF YOU WANT IT