thinking about buying, need some questions answered.

[Irish's_79_Step]

I am looking at buying this truck, as a parts truck/ winter truck.

http://milwaukee.craigslist.org/cto/2990862228.html

The problem is that it doesn't really run well. I need to know what the possible problems are that would cause it to idle ok , kinda, but nothing else. I looked at the fuel filter and couldn't notice any fuel moving through it. It would kinda idle but kinda wanted to die, if you tried to rev it a little it would die almost instantly. If you very slowly gave it gas it would rev to a point and then kinda peak and wouldnt go any higher.

Problem is i dont quite know what i'm looking at. I'm giving you all the best description i can. Any ideas greatly appreciated.