My Carter Comp AFB that I had on my 383 would alaways run lean no matter what pump, nozzles, jets or rods, then I adjusted the float level higher than spec so the bowls would have more fuel in them, and it finally went rich. After fixing the float level issue, I ended up back to almost the stock jetting.
I also have a pair of Carter Comp 750s on a blown small block. After purchasing a O2 I found that to get them to 11.8-1 F/A all that was required was stock jetting with only a metering piston spring change. Doug
