I see you're in AZ. When I lived there, passing emissions in Maricopa county was a major PITA. I had to replace the smog pump each time I headed to the testing station. I finally punted and registered the truck in Montana. No emissions test required.
That's true. I lived in Phoenix until 2002. I moved to Gila county, no smogs tests, and don't miss the smog dogs. The problem for me was you I pass a tailpipe test and still fail visual. In 1990 I swapped a TBI 350 into my 78 Land Cruiser. Even without a CAT or air pump it passed the tailpipe test by a factor of five but because it didn't have the OEM factory emissions, it was failed and I had to get a waiver. At that time you had to make a certain dollar investment in repairs before a waiver would be granted. They've changed a lot
of the laws since then. Swaps have gotten easier as long as the donor motor is newer than the one it's replacing and the emissions
for that motor are intact. The emission laws that allowed the sale of a late 70s FJ40 changed so by the late 80s the FJ40 had trouble
passing. The original tests only involved an idle test. They were factory tuned to comply. It the late 80s in AZ they added the load
test with a dyno. Mine repeatedly failed the load test year after year until I did the TBI swap. Unfortunately it didn't pass visual
and was actually threatened by DMV with being cited for tampering with smog equipment, a federal violation punishable, at the time
of 20,000.00 per infraction. Luckily it was an idle threat. Our DMV agents were poorly trained for the task which turned out to be
a blessing once you figured the system . You learn how to mock up fake air injection and hollow cats real fast. Such a waste of time
when all they should worry about is what comes out the tailpipe.