1984 C10 emissions in AZ!?

[NolanRyanLady]

Hey yall!! It's been forever since I've been on here. But I'm having an issue! I bought my c10 last year and it had already been through emissions so I didn't need to take it to get it plated. Well now I need to plated again and its due for emissions. I took it through the other day and it failed..
I talked to the previous owner about it and he said he didn't even take it through emissions, he had his mechanic do it.. on the paper he had the truck passed with flying colors, but it was a Retest, his first test failed just as bad as it did the other day.

Well we changed the oil in it, put a new air filter on it and put a bottle of alcohol In the tank and put gas in it, and it failed again... Worse this time!

Idk what to do. The mechanics retest was half of everything. Idk what he did but I'm stumped. This is my daily driver and I need it to pass!

It passes equipment and Hydrocarbons and Oxides of nitrogen, but it doesn't pass carbon monoxide.. Idk what to do! Help!

It's got a 350 auto with a Holley carb.