I've seen the little screen in the inlet fitting of the carburetor of some Fords get clogged.
Be sure to check the screen in the top of the sediment bowl assembly. Make sure the gas tank valve is all the way open and not clogged.
The hose between tank and sediment bowl could be kinked or deteriorated internally, blocking gas flow.
If good flow comes out the bottom of the carburetor with the plug out (outdoors, engine cold and not running, of course) you'll know it's not starving for fuel.
Wish you well