Installed a brand-new carburetor and it cranks but will not start?

When we first got the truck, the carburetor would flood, so, it would actually start then. We drove it maybe 10 miles and went on a dirt road and it shut off. Sounded and acted like it fid when it would flood. We bought a rebuild kit and it wouldn't start so we just bought a whole brand-new carburetor, and it cranks but won't start. We got a new distributor, and the spark plugs are all good. We know there's fire because there was a little fire where the oil goes. But we've since did a complete oil change. Now sometimes when it's cranking it will sound like something pops from pressure (not sure if that has anything to do with it or not). What is wrong with it? So tired of having no vehicle.