buying a vr4 engine, vr4 ecu, vr4 loom, modifying the LH mount, new clutch, new belts, fluids, plugs, leads etc
cordia box bolts up to the vr4 block. will need a new dump pipe and front pipe modified. best to upgrade the front brakes and enure that all your engine mounts are in good nick.
much better option that strapping a big ass turbo on the SOHC. the VR4 is a much better, smoother and high revving engine. plus easily modified in terms of availability of parts