Stop in for a cup of coffee

How long should it be run in each of those rpm/speed brackets to accurately test the plugs?
Hah! I wish I knew that. We know that some guys could read a plug after 10 to 20 seconds at wide open throttle. My impression was two or three passes were better.
Next time any of us get a chance to talk with some older class racers (stock elim or SS) probably a good discussion starter. Whether ther also have insight into street or roundy round will vary. The guy who first mentored me was very focused on short trips, about a 1/4 mile at time. LOL.
Right now it is a bit rich, at what rpm, not sure. All? I just don't want lean at cruise. Although 8 barrels of fuel at awaiting at every need for more input.
With the distributor set as it is, wait til you can do a WOT pull or two in high gear at the track or a safe dyno.
All this talk about adjusting the PCVRs is fine, but in my limited experience the Holleys were pretty much close to correct relationship as sold.