Glad to help.

It's a rare occasion that a former Chevy Rat has any real input, but this Qjet stuff is my old backyard.

I thought of one other quirk these Q's have in common. If you remove the carb and inspect the underside, you'll most likely find a good build-up of carbon right in the center cavity. Clean this out completely! It has a vacuum orifice that assists in allowing fuel into the secondary bowl. I've also found that a heat shield and a wooden spacer do wonderful things for economy, once everything else is dialed in.

Don't let anyone tell you to get rid of it! It is excellent at low RPM mileage and there's nothing that flows more at WOT (factory). So, enjoy!