Im stumped, It's missing and ticking.

Ok so Im still dealling with the same problems as before. After I swapped the intake gaskets it ran fine for about 3 days and then it went to crap again. I am now on my 3rd distributer, I have taken the carb apart and checked for any cracks or anything that would screw it up, replaced the carb mounting gaskets, and thrown about 3 wrenches across the street just to show the world how pissed I have gotten.
What it is doing now is at start up it runs fine until I give it a little gas then it starts to backfire and cut out. If I unhook the vacume advance from the carb it runs fine (yes I have it hooked to the passenger side port and yes I have checked it with a vacume guage and there is no vacume at idle). If I drive it for alittle bit with the vacume advance unhooked it will run fine for about 10 mins and then it will start to sputter and I have to power brake it at stoplites to keep it running.
So what the hell?!?!?