#60329

I had a Holley 600 CFM a number of years ago and I could not get it to work properly. It either starved out or flooded, no matter what I did to the float level. I had the same situation as you (fuel pump constantly running) with this carb.

I finally switched to an Edelbrock (old Carter design), but went to a 500 CFM for my 260 motor.

I’m no carb expert either, but after I switched, set the idle screws and tweaked the timing I drove a 400 mile round trip to a car show in Maryland. I have not touched the carb since.

I’ve heard good stories and nightmarish ones about Holleys in this size range, don’t know why that is.

Fred Baum