Any comments, suggestions, tips, negative comments, positive comments, opinions, instructions, directions, etc. for what i wanna do?

My friend brought up the idea, and i like it!
He suggested i buy a B16a1 and take the top half, and sell him the bottom half, with the top half i will take the VTEC head, distributor wiring harness, and anything else i wil need (anyone know of anything?) Then bigger sleeves. Then i will try to get a GS-R ECU with the B16A1, and install that in my 91 GS, so i will have a B18VTEC. which, from my assumptions and some knowledge of my friends, will be a beast of an engine.

anyone know of anything else i would need for this conversion?