Thanks for the input. I tried many adjustments to the accelerator pump circuit changing nozzle sizes,cams and arm adjustments but it still bogged. Changing to higher vacuum level power valves made the bog problem get better.
It seems the accelerator pump gets you going over a short rpm range when the accelerator is pressed. The power valve picks up from there and covers a wide rpm range. If vacuum drops more gas is added to keep the rpm up without bogging.
I do not intended change to EFI, especially now that my Holley 390 is working better. I was just thinking I might switch to another carb if the Holley did not work out.
