I think most people do the B16a swap in 4G's because of its ease in finding a complete swap package with the cable tranny. Although i have emailed HMO and they said they would put together a B18C or whatever motor with a cable tranny and sell it as a package you just have to ask. If you are trying to piece together a kit like that yourself i say forget it, because its hard to trust people to make sure their parts are legit or if they even work properly at all. The 4G engine bay is so cramped already it is just not worth some peoples time to make a street legal car with some ungodly swap in it, although people have put RX7 motors and Eclipse turbo engines in them before at a track near me(Rockingham Dragway, NC) but then wiring becomes a nightmare and both of those cars were trailered in.