[1974ChevyC10]

i hd this problem on a 74 i used to own basically if i stomped the pedal it would fall on its face like it had no power but if i gradually gave it gas it ran fine and going uphill it was lose power.turned out to be the fuel filter was dirty and needed replaced.changed it out and cleaned all the gunk out of the carb after that it ran like a champ.i would check the fuel filter as well as all lines and give the carb a good cleaning and rebuild if necessary.