You need to install a piolt bearing, if your running a mech.fan youll need to switch over the RWD water pump assy. if electric youll be fine. I dont remeber if youll need to swap the whole water line set,been a while since I took a hi comp apart).Youll need to either get a RWD manifold adaptor or youll need someone to cut,swap and reweld the FWD manifold to fit RWD configuration. Youll need to switch over your 16v flywheel unless you have a good ae92 clutch,its bigger. Itll run off the bluetop stuff but the injectors are high impedence so youll have to search here or club4ag for the info on how to bypass that. Im not giving out that info just incase I mess up and you blow the motor some how? other than that I think that covers the basics.