i have an 85 prelude 1.8 dual carb that i want to change to fuel inj. i have a 90 2.1 Si motor sitting around that is going into a different car. can i put the 2.1 head and intake (throttle body and fuel injectors) in the 85?

i then want to take the 90 2.1 and do a lot of changes to it (bore it out, etc) and make it a vtec. i was told that i just needed the head from a vtec and the ecu. is that all? what else do i need to do?

does anyone know about either of these?