Just to reiterate, the factory 1 bbl Rochester carbs are not problematic in any way shape or form. In good repair they are a workhorse carb that was installed on millions and millions of trucks and cars and were as reliable as all get out. The problem with them today is that they are old, most have been rebuilt who knows how many times by how many people with who knows what skill or knowledge. It use to be that you could get some decent carb cleaner, a good kit and give it a rebuild. But after 60 plus years, I think, and this is just my opinion, that you are heads and hands ahead by having a real professional rebuild the carb. The professionals have so much more available to them then we hobby backyard home driveway guys. Ultrasonic baths, tumblers, throttle bushings, new screws and proper staking equipment for the throttle blade, ability to face the surfaces flat, proper tools to get the check ball seats correct, those little lead and aluminum plugs to get into all the channels and chambers, chromate baths, wet and dry flow benches and all the proper tools to make the bench adjustments. I read more posts by more people complaining that their home rebuilt carb is not working properly, and then claiming that its the design of the Rochester that is poor and unreliable. Save yourself a lot of aggravation here and send that carb to someone good and have it rebuilt correctly. It will run like a champ if you do.