[GREASEMONKEY72]

what carb do you have?? the stock quadrajet? if so with the truck off turn the idle mix screws all the way in clock wise then back them out about 3 1/2-4 turns then with the truck fully warmed up adjust them till the truck runs right, and also when i tune mine i play with the idle screw and the screw for the choke if needed, i hope that helps any, if not someone will give you better info im sure