i just moved to this god forsaken wasteland two weeks ago from michigan. the warm welcome i received came in the form of a smog test for my 69 mustang GT. i thought it was a joke at first, or i misunderstood something... no one really tests cars built in the sixties for smog, right? WRONG!!! the wonderful state of Arizona does just that. so i drove my convertible down to the smog center in the 110 degree hell they call summer, "but its a dry heat dont ya know". the car ran perfect, god knows it should considering the money i've put in it!, i got there and failed my first test. apparently the car "pollutes"....who would have guessed.... so i set the timing back to tdc and leaned it way out, then i increased the idle and gave it a tune up, i also put a hipo 289 air cleaner on to see if that helped. so now the car that i spent three years to make perfect runs like crap, im waiting for my 351 to explode at any minute. i went back to the inspection station and again, although just barely, failed the test. this time i had a few choice words for the people running the place..... so here i am: the smog people think im insane and i spent 30 grand on a resto and may have to tear the car apart again. the only thing that is high is the CO loaded, a 4.06 out of 3.75, every thing else is really low. the car has the original 4bbl and i was hoping i wouldn't have to mess with it. the engine is totally rebuilt and i'm worried if i retard the timing any more i may screw it up. is there anything that will lower the CO just enough to pass? and, who else thinks testing cars built before 1974 is ridiculous? Had i known arizona did this i truly would not have moved here.