Originally Posted by Gen1dak
Mech fuel pump would not be affected by a hill. Carb first. Just because you put a rebuild on it doesn't mean it's working properly. Failing that, consider a decayed fuel pickup and/or pickup screen in the fuel tank. Does it cut out the same on a 3/4 full tank as it does on a 1/4 tank when on a hill?
My wife suggested the same thing, and my dad said it still did it with a full tank yesterday morning.
My dad is supposed to hit up the pick a part to look for carbs and a harmonic balancer... but its 110 today...so not sure he'll get out of the house..