Well I'm the guy who says fuel injection beats a carb every time. It has kept me away from carbonator service questions until now.:devil:
OK, the reason we told you to rebuild the carb yourself is this is exactly what happens when you start playing the parts swapper game. You just spent good money to have the problems taken care professionally. Take the car back to where you got it fixed and demand that it work correctly without spending any more money. They already had a chance to check the car and give you an estimate which they did. If their guess does not fix the car then they should eat it. Without seeing the car all I would be doing is guessing which I try not to do. I'm not going to throw out a laundry list of possible problems just yet! Don't try to diagnose the thing, let the shop do it. Write out a slip of paper listing your complaints including whether the car was warm or cold, the outside air temperature and anything else you feel important. They already want to throw another rebuilt carbonator at it. BTW if you tell them that the car starts right up and then stalls when cold they should suggest leaving it overnight. If they don' then that is a red flag. Tell them that you don't want the car back until it runs correctly.
This reminds me of when I used to do this crap for a living. We finally gave in and started rebuilding every carbonator in-house to eliminate the roll of the dice when using rebuilts. Hopefully, the next carbonator solution in a box will work. If it does not then we can play the guessing game. Maybe they don't understand how to adjust anything or have mis-routed a vacuum line or 2. BTW there are at least 2 other people on here who just worship this exact fuel system. I have worked on several of these but do not consider myself an expert. My definition of expert is one who has made all the mistakes.