Nissan 240SX Performance Modification/Engine Swaps/RB20DET
Specs and Versions
The original items from the 240sx will work. All you have to worry about is the wiring harness, exchanging of cross members and steering rack.
For a wiring harness you can either splice the KA harness with the RB (which can get hectic at times) or purchase a pre-made harness from a provider or specialist such as Wiring Specialties or run a standalone such as a Painless harness.