Ok, Poorboy commented about fuel pressure.... I think I have a problem here. Truck has a vapor return line. I put a tee on after the filter and before the carb. When running I only had about 3 psi. If I pinched the return I could get about 4 psi. Removed filter and used just the tee and had almost 5 psi. I don't think this is enough. The FSM for the truck states the original mechanical pump should put out 4 3/4 to 5 1/4 psi at idle.
This is an electric pump of unknown brand/quality. When turned on it should be running at full speed, volume, Correct? It did pump a quart in 45 sec. The spec for the original pump was 1 quart in less than a min at idle. Thoughts on this anyone...

As for the muffler and exhaust. I checked the flapper on the manifold and it was free to turn. The muffler I don't believe is plugged and It's not the original as it said Quiet flow on it. The rest of the exhaust is original to the truck.