could be timing chain jumped a tooth, u say u bought this truck none running , how many miles are on the engine what abought the dist what kind of shape is it in
iv got an 86 gmc with the 305 and had the same set up u have, as soon as i put in a diff dist and carb my fuel milage went down bad . if i were u i would leave it as is and drive it
I found this article while searching for good tech information on the comparison of ported vacuum versus manifold vacuum. I don't know the author so I can't give valid credit. ChevelleStuff.Net doesn't indorse either method and there is a lot of discussion as to which is better. So, I'll present...
first i would pull the fuel line going to the carb, crank it over to see if getting gas, if not go to fuel pump and the rubber lines , not being snarky but is there gas in the tank ?