Bolted the fresh #7042264 carb (Recipie #1) on and the Pontiac 400 runs excellent! Idles perfect, no hesitation, maybe a very slight bog with secondary (thinking maybe need to tweak flap spring or restrict vacuum) but overall, very impressive!
I am sure I can do a little more adjusting with rods & jets (has stock 74/47 primary and CS secondary), but much improved and very driveable as is.
I will be ordering rods & jets to keep playing with my 7043252 as well, which had 70 jet/50 rods, and CJ secondary, so a little on the lean side with primary...
Thanks for your expertise and parts!