Carb problems. Help.

[jorgensensc]

I recently did a total tunup on my truck because the wires were burnt from the manifolds. I had a deiseling problem develop before I did all the work and I figured this would help fix it. Needless to say it didn't. I'm soo frustrated since I can't seem to dial this thing in right. It's a 350 with an edelbrock RPM Air Gap intake and a edelbrock 1406 600cfm carb. I replaced the wires with all new good ones and plugs, fuel filter,exhaust manifold gaskets, etc. I have even been trying to adjusting the carb without any luck. I set the timing to 8 degrees BTDC. At a stoplight if you mash the gas it will sputter and cough, and even sometimes die. Even sometimes if you lightly press the gas it will die out. Not all the time, but sometimes. When I first start driving(whether the truck is at operating temp or not) it will backfire once through the carb, but doesn't do it again after the first time. When I go to turn it off it wants to diesel sometimes, not all the time, but sometimes. And it is usually one of those long ass ones that you think will never end. The truck runs great when above idle and on the road. Performs great with no hesitation at all. Please help me figure out this problem I am getting so frustrated, not to mentioned embarassed when my beautiful truck stalls in the middle of an intersection coming off a light or starts deiseling in front of a store.Thanks to all the advice and help in advance.
Shawn