IDLE PROBLEM

I HAVE A 1985 CHEVY EL CAMINO WITH 60,000 MILES WITH A 305. I JUST REPLACED THE CARBEURATOR WITH A REBUILT STOCK ROCHESTER QUADRA JET WITH FEEDBACK. THE PROBLEM I HAD BEFORE THE REPLACEMENT WAS FLOODING OUT. NOW THE NEW CARB WILL IDLE UNTIL IT STARTS TO HEAT UP. IT STARTS TO BOG DOWN BUT RUNS IF YOU GIVE IT GAS. HAVE CONTACTED REBUILDER AND HAVE MADE SOME ADJUSTMENTS WITH NO HELP. ALL VACUUM LINES ARE GOOD, JUST REPLACED ABOUT A YEAR AGO. CHECKED CHARCOAL CANISTER FOR EMISSION CONTROLS AND FOUND OK. IT DOES SEEM TO HAVE A MISS BUT HAD IT WITH OLD CARB. NEW CARB DOES NOT SEEM TO FLOOD OUT AND RUNS SMOOTHER JUST DIES AFTER ABOUT A MINUTE RUN TIME.