a swap in a 3rd gen honda prelude such as the h23 or h22 can be tricky.. everything must go.. ecu... special mounts... custom axles must be used... and remember how old our chassis is.. make sure that you reinforce the chassis or have a ****ty ride.. check out preludeonline.com's 3rd gen board.. we have MANY people there doing 3rd gen swaps such as h22s.. h23s.. b20zs.. and your standard jdm b20a (me!!)
i hope this isn't your daily driver... good luck...