Back before I bought my house in 1984 I live in Allegheny county which is the same county as pittsburgh. I refused to have mine done for the 5-7 years it’s was required. Back then it wasn’t tied into your state inspection so I rolled the dice and won.
Yeah, I knew a few who did that, I got My IM license '85....always did My own. Funny one, before I put the PurpleShaft 284°/.484" in the '66 383, it sniffed clean for an '83 318 Diplomat.....passed with flying colors w/a 3310 750 on it, lololol...