1976 Jeep J10 Not getting gas?

Assuming it was running okay before, there's just a few things to look at. First, loosen the line going into the carburetor, then see if fuel sprays out during engine cranking. If it does, suspect the needle is stuck to the seat in the carburetor. That isn't real common because the fuel pressure should push it open.

The next thing is the fuel may have evaporated all the way down to the fuel pump. I have one car that does that. I start the engine at least once a year and it can take over half a minute of intermittent cranking before the fuel gets up to the carburetor. When I used to run it out of fuel to measure fuel mileage, the fuel pump would never draw a prime when cranking. I had to dump gas down the carburetor so the engine would run. That speed was needed to get the fuel pumping.

Now that you've had the engine running, if there's still no fuel coming out of the pump, suspect a plugged pickup screen in the fuel tank. If there was gas in there with ethanol, mold will grow in that fuel and it will plug the screen.

Before you pull things apart, you might try a little compressed air through the inlet. If that works to dislodge the needle, keep an eye on it. If you see fuel overflowing and causing a flooding condition, stop the engine right away and let that gas soak in for a while. That should dissolve the film of corrosion that is preventing the needle from sealing completely.

If you do get a lot of gas running out and flooding the engine, be sure to change the oil once the problem is solved, to get that gas out.