I'm installing an 06 LQ4/4L80E in a 1984 G30-chassis motorhome. I know, I'm crazy

I'd like to keep as much of the emission controls intact as possible so as not to aggravate the California Smog Nazis. (I'll have to take it to a referee station to get it registered). I'll probably keep the evap canister. I've been told I can probably get by w/o cats.

Right now I plan to have the VATS disabled, but should I consider other changes as well?

Any recommendations on where I should have this done?

Thanks,
Jay