Truck is stalling out...Do I need a new carb?

[spoalowairchamp]

Anybody have any ideas about this new problem I'm running into. My truck will just cut off when I'm driving leaving me steeringless and brakeless. When it comes to a complete stop I can crank it right back up and start again. I took it to the shop and the mechanic hopped up the idle a tad but said I'd need a new carb soon. I thought maybe it was a clogged fuel filter.

It had been running well lately with the exception of the idle dropping when the truck was still and black smoke coming out of the pipes. I started running Lucas fuel treatment and that seemed to help a bit. The other thing is if I jam the gas pedal to the floor it sputters then catches up accelerating slower that it seems it should.

Sorry for not putting this earlier. My truck is a 1982 C-10 - 305 - Auto Trans and I believe a 4brl carb