I went to go start my truck up after a few weeks of sitting waiting on a part and it wouldn't start. I saw that there was no fuel in the filter so I assumed it wasn't getting fuel for some reason. I went through the system checks starting with running an external tank of fuel between all of the points going back from the carb and could get it to run from all of them. I assumed it was either a rust line/hose somewhere under the truck since I could run the truck externally with a line before it went into the filter. For shits and giggles I hooked everything up as it would normally go and the truck would start and idle like normal with no issues. When trying to go up my driveway that's on a hill it had very little power going up it with the front facing the up hill, but when I turned the truck around and tried backing up it it seemed to have more power.
I'll be grabbing a fuel pressure gauge from my work tomorrow where I can just T into it and watch it while the truck is running, but while I wait for tomorrow to come does anyone have anything different it may be that I can consider to check tomorrow? I'm leaning towards the pickup being the problem, be it rusted and broken or something else with it. I have yet to fully examine the lines underneath the body which I'll be doing tomorrow as well just to start eliminating stuff that it isn't.
Also I assume the tank needs to be dropped on these trucks right to get to the pickup and what not? ('78 if that matters)