It is worse in some states, but smog exempt is hard here.
I had a nice 77 GMC K15. I had a dana 60 rear, dana 44 front, TPI, Art carr 700r4x2+TCI (mistake), recarro buckets, custom everything and I was the original owner. Was supposed to be smag exempt up to 77, then they changed the law in 75 making that the last year!! Now they are redoing it again making 81 back smog exempt.
Same with my 06 DMax, was smog free when I bought it. Now I have to smog that. But once done the 91 (pre 97) will be be exempt.