[gonzo6869]

Had a similar problem. I changed the fuel sending unit sock, did not change a thing, but was old and needed to be replaced anyways. Next I checked the plug wires. One of them was laying on my headers, it was burnt, changed them, it was a little better but still had problems. To keep it short, due to a surplus of cash at the time, I bought a new carb, help a lot but still had issues. Got pissed and decided to throw parts at it. I ended up changing the vacuum lines, fuel pump, and plugs. The plugs I pulled out were not that bad, but were put in before an HEI was installed. They were gaped at .35 so with the new ones I changed it to .45, also, the plugs for number 5 and 7 cylinders were very loose, I could turn them by hand. Anyways, after all this the truck was running tits.

I would suggest changing your vacuum lines, if you got a TH350, that one too. Change your plugs and wires. Rebuild or buy a new carb(if needed). And a fuel pump. Of course you will do all this after checking your timing. O yeah, change your fuel filter(s).