I have an '82 Chevy 1/2ton 4x4 with a 350, 2 barrel. When I first bought it 8 months ago it was running great, but in the last few weeks its been struggling a bit, and then went downhill sharply in last couple of days. At first it started missing/coughing at higher speeds (90kph+), then got to the point where it was sputtering and stalling when I went above 90, 80, 70... Now I can't even get it to take any throttle. I also noticed that it would cough and sputter if I was cruising on very little throttle - ie, I could accelerate with a fair bit of gas, and no problems, but it didn't like me floating on low throttle. It idles fine, but misses at higher rpms, even when its not in gear. At first I thought it must be fuel pump, because it also tended to be worse when going uphill. I replaced the fuel pump, and the distributor cap, rotor and wires, and put fresh plugs in. It sounds a lot better, but still I can hardly even get it moving before I have to put the clutch in because its dying on me. I changed the fuel filter when I first bought it, and it still looks pretty clean. Now I'm at a bit of a loss. The plugs were quite fouled when I pulled them, but they don't smell or have odd discolouration, just oil. It has fouled plugs pretty quickly since I bought it. Some of the vacuum hoses are not connected, but I don't think that is the culprit, because they haven't been connected the whole time, and my problems have only been in the last 6-8 weeks. I'm at a loss where to look next, any suggestions? I thought I would check to see if there was a second fuel filter in the lines somewhere, but that was the only thought I had.