[MrLee]

Thanks for the reply. I'm only moving my truck 20 miles as I must put it in storage for awhile. I have the original carburetor on the 305 and up to this pump problem, everything ran great. I've considered going to the Holley to better the current 10 MPG but I have no plan to do so. It already has dual exhaust. My GMC is 1964 and has a camper that I use within the borders, so far, of Florida. It's a great machine. A parts guy at Autozone told me that a lower psi was better for this truck as it is old but I have no faith in counter guys unless I know they are good mechanics. They sell an electric that is 4-7 psi and a more expensive one rated 5 psi. I don't know.