1. Definately a MPFI swap first, talk to ED9Man, he had some stuff for sale a while back, may still have it...
2. Nice looking stock wheels are the Integra LS meshies or GSR blades... Love the looks of both...
4.(3 and 5 are linked so Ill answer them together) Performance chips are a no go... The problem is there is no way they can tune one chip to work for all cars... So the power boost, if any is limited...
3 & 5. The block isnt really the problem, its more the head and throttle body... So changing to a VTEC head (yes its possible) will definatly help you out! Ofcourse youll only have 1.5 compared to the 1.6 of the D16Z6/D16Y8 (one of the engines your gonna have to take the head from to do this) but the VTEC will help alot...