"I spoke too soon it looks like. Since changing to the .031 idle feed restrictors and .072 idle air bleeds I noticed I have some black smoke coming out the exhaust when I have it idling in park and I give it some gas."

Did you reset your metering screws?
(Note: .031 IFR / .072 IAB is not what I would call a rich setup, it is more lean if anything.)


What size pump cam/squirter do you have?

Note: It sounds like you may have a component adding too much fuel at/or off idle. If the above seem normal, check to see if you have any rotation in your power valve assembly. Hold each end of your PV with each hand. If you can spin either end of your PV, then IT WILL LEAK even if the engine is not even running [if the fuel level in the bowl is at or above the PV level]. QF gave me this advice a few months back and I found my existing QF pv and one of my spare Holley pv's could twist. Don't use a lot of force, but just see if the PV assembly is intact.