I put a rebuilt quadrajet carb on last summer. Now that its getting pretty cold when I go to start the truck (84 k10 305motor) it only seems to run on a few cylinders then dies. I start it again and it will do the same thing. Then I have to floor it like it is flooded and it will start and run while I feather the gas pedal. then it will idle just fine. But if I try to put the truck in gear it dies. It will keep dying until it warms up enough. Is this a too rich condition? I havent had time to adjust the carb yet so I'm thinking of first setting the idle mixture screws and go from there.