Convert to replaceable idle air bleeds?

I think I may also need to relocate my IFRs (currently in the well near the top)... time to buy some replacement expansion plugs! It does dance around some, but this cam is quite lumpy anyway. Not sure if it will help that much?

(Crossposted from racingfuelsystems Holley board)
A frustrating afternoon under the hood... got brass screws for the choke plate, put the carb back on the engine, turned on the fuel pump and gas started pouring out of the secondary boosters and even the bowl vent.
Shut it back off, cleaned up all the gas, took the rear bowl off... nothing much to be seen, maybe a tiny amount of crud. Anyway I cleaned everything up carefully, put it back together and set the fuel level on both ends with the engine off (just dribbling out of the level holes, 5 psi).

Fired it up, wouldn't idle, waaay rich on the AFR gauge (11.5-12:1 at low speed, 10.5 at 3000). Discovered my original primary idle screws were much more than one turn out from bottomed (the new cork washers were interfering). Fixed that, opened the secondaries slightly, then it would idle at an indicated 14:1 although that figure is not really useful with a big cam with lots of overlap.

It still likes to idle at about 1200 and 8" vacuum with all four screws about 3/4 to 7/8 turn out, drops 50-100 rpm when the fans kick on. Pretty much what it did on the 2-corner idle! A lot of screw-tweaking later, I couldn't make it any better or get any higher idle vacuum (but opening the four idle screws past one turn definitely made it idle worse even without the fan load, so I know I can get rich enough).

Now the tip-in flat spot is back on a short run down the dirt road. I had barely touched the primary idle speed, and don't think I'm more than square on the t-slots, but will try trading off primary for secondary idle speed screw turns. Also need to recheck the primary accel pump to make sure it's squirting immediately. (I'd put the pump cam from my old baseplate on).

And of course then the wideband decided to stop working again during the last shutdown (I really need to pull and clean the sensor).
That's quite enough for one day. At least it was 66 and sunny!