Nulon and Impossible Fabrication recently finished their Civic project car. They started with a 1992 Honda Civic and replaced the factory engine with a 2.0 L SR20DET from a Nissan S15 and also converted the Civic to RWD. They found the entire Nissan S15 with rear end damage was cheaper than buying a B18C motor. Besides using the powertrain they also used the front and rear strut towers, subframe, brakes and the full wiring harness from the S15.
Source: Nulon Blog via Build Threads