You shouldn't have any issues with emissions since Maricopa County only plugs into the OBDII and look for any codes, no rolling dyno and sniffer. They do that for pre-96 OBDI vehicles. I'd take it to your favorite auto parts store and have them check for any stored/pending codes, if so, have them reset and see if any come back. Good luck and welcome!
Edit: They do a visual under the hood too so, make sure everything that came with the truck is still there.
Edit: They do a visual under the hood too so, make sure everything that came with the truck is still there.