you go to the arb referee and get your car inspected and re-tagged for smog purposes. my 85 fj60 is now a 91 GMC which is what my 350 crate motor with tbi is. it wasnt a big deal but i did have a couple issues to contend with...mostly i didnt clear the codes i developed while testing the motor before taking it into the referee and he didnt like my gas cap either.
from there on though its all good: less weight, more horsepower, ability to pass smog check II with flying colors. and of course you get to put fuel injected corvette insignia on your fenders! and in my case it looks like a factory motor installation.
one love
jah bill