I just had the emissions tested in Broomfield on my '72 FJ40 and they didn't put it on the dyno or even open the hood. They just ran it up to about 2200 RPMs and then let it idle for a bit. It was running rich during idle the first time so I adjusted the idle mixture and it passed to second time through.
Kent Van Oort
1972 FJ40 Current Project, 1978 FJ40 Sold Project, 1975 FJ40 High School Cruiser