Ok, just picked up a 1990 240SX with an auto tranny and KA24E, and I want to drop in a 5spd and a KA24DE. I will be picking up a KA24DE shortly with ECU and wiring harness, and shortly after I will be getting the tranny, clutch, pedal, master/slave cylinders,driveshaft and all that stuff. My question is, how will this affect my current wiring harness? Do I just rip the whole thing out and replace it with the harness from KA24DE? Will all of the wiring connect up fine to the chassis? Or will I have to do modifications to the harness's? Thanks for any answers.