this is what i was going to do before i decided to scrap my project for the time being. i was going to get a p28 or obd1 p72 ecu chipped and running neptune. i would have had 450cc injectors and an external wastegate.
in arizona there is no inspection once you have gotten your car registered in the state. and they also only have the plug in test for emissions. come time for emissions i would have taken my stock obd2 ecu and gotten a vafc to run my 450cc injectors.
if where you live also smog checks your car, then i would take an extra precaution and pull the wastegate spring so as to never go into boost, even if they decide to floor it to where they check for smog in 3rd gear.
