Tune up (or what?) Suggestions...

[Zilverado]

Okay, so I posted a starting problem on Friday. I got home that afternoon and managed to get the truck started, but there is definitely something going on. She's running rough (even stalling at lights) and the exhaust is black and smelling rich. This even happens with the engine hot - choke is open. At driving speeds, she seems to run fine.

So, I'm gonna start with a long overdue tune-up (plugs, wires, filters, etc.) and see how she performs then.

My question is - - are there any particular things I should be looking at? Does it sound like anything specific? I realize the symptoms could probably be anything, but I thought I would ask.

Thanks in advance.