2x4 1850 holleys Jetting?

[Michael C Henry]

last summer I thought my carbs were the problem with fouling plugs and had the carbs redone .Turned out to be the Mallory HyFire VI was giving up .New box ,things got better. Still fouling plugs but more gradually. You can hear it start under certain conditions gear and load( this time on the right side)Carbs came back from being redone with 73 jets in primaries. I feel that is a little fat. Carbs came in car from Reno with 64s. In Washington, the emmission statiton said I had a lean missfire. Carbs were originally produced from factory with 67s . I think they were redone as if I were racing and changeing plugs was an every other run thing. Changing plugs in an FE with alluminum heads is not verry quick or convenient.I seriously beleive I've spent verry little time if any with the secondaries open. I'd like to be able to drive it around and not have to worry how far I can get before the plugs start causing missing and poping out exhaust and wondering if I'll be able to get it home if I don't head home now.. It realy detracts from the cars impression. I really hate those foam elements in the two Stellinig and Helling air strainers.