"The KA24 has a distributor; the SR20DET uses a distributorless ignition system. As such, some of the wiring on the harness is incompatible with the car harness and the ECU. There are two ways around this: Modify the 240SX ECU to work with the SR20DET engine or use the SR20DET engine, SR20DET ECU, and a special engine wiring harness."
-someone needs to firebomb superstreet HQ for sayin this.

the sad part is it took 3 "real" mechanics(and God only knows who else) 6 hrs to do the swap, in a shop with a lift no less. i, only me no help, can do what they did in about 6hrs on a sat and it start the first time(assuming nothing major is broken).