Yeah, some of the later Edlebrock's are even sold under the name of "quadrajet". I believe Edlebrock bought the old company and started producing the carbs (correct me if I'm wrong!)

Joe

Joe, I'm with you. I know they bought Carter several years ago and I think they have a licensee agreement to build Rochester Quadrajets, and use the Quadrajet name. They may have purchased Rochester, but I don't know. Maybe someone else has more details. I'm a Holley man.
When it comes to carbs, they do wear over time. The internal parts wear and become loose. Throttle plate shafts wear and cause vaccum leaks. They will eventually wear to the point where you or your local shop will not be able to rebuild them. There are companies like Jet Performance Products, who can help and also offer Q-Jet carbs. www.jetchip.com

I'm running a edelbrock right now and I am happy with it,
but I do have a bigger holley on the shelf and was considering rebuilding. You say some times they are beyond rebuild? Is there anything that would stand out that may be a warning sign of a non rebuildable unit? I dont want to waste the money rebuilding it..ya know. Thanks for any help.

Nate,
I look for corrosion damage to any of the internal parts and wear in the throttle plate. If any of the moving parts have too much slack or wear, it becomes very hard to tune the carb. Adjustments screws and seats can become damaged and in some carbs are not replaceable. Example: One of the mixture screws was stripped out on my Q-Jet. The prior owner had used silicone to hold it in. That could not be easily repaired. I chose not to rebuild it. Pending the type of carb, they all have their weakness. Holley's throttle plate bases are weak. If you yours is damaged or worn, Holley does not offer replacements(Proform does though).
Disassemble your carb and inspect it for any damage or wear. If you decide to rebuild it yourself, take it to a shop and have them clean it for you. There are solvents available where you can do it yourself, but if you leave carb parts in too long the solvent will do more harm than good. There are several books available to use as a guide for rebuilding carbs. I recommend going to Barns & Noble, have a cup of coffey, and look through the books available for tips and information.

I kinda like to keep edelbrock with edelbrock. In all their ads they claim that all their components are dynomatched which makes sense to me. I wouldnt be afraid to keep the stock Q-jet, contrary to what some folks may say I have found them to be outstanding carbs, especially if your not planning on upgrading the cam.