[Red Si]

I'm in the process of building a CRVTEC and may soon be getting a '90 CRX Si. I want to drop the CRVTEC into the Rex but I have a few questions. I realize I need the B series tranny, mounting kit, axles, shift linkage, wiring harness, and ECU (I already have a Skunk2 chipped JDM P30 for it). My question is what else am I going to need? Do I need to replace anything like the water pump, radiator, fuel pump, etc? What parts does the Stock Rex Si have that I would be using for the swap? Also, what wiring harness would I use with the P30? Any other info would be greatly appreciated. Thanks in advance.