What kind of carburetor, 2b or 4b, what brand and/or model. Do you have headers? Since you replaced most of the stuff, were you having this problem to begin with, and you replaced those things, thinking it would fix it. Did you replace the flexible fuel line at the gas tank to the metal fuel line, I have seen many times they draw air instead of gas. The second thing is why can't you pump the accelerator to quirt gas into the engine to start it, if the accelerator pump does not squirt any gas, then you either have a problem with it not working or the carb does not have enough gas in it. You need to check your float level dry or wet, wet is better, but not all carbs can run when you have access to the floats. Vapor lock is where the heat has got the gas so hot it can't be pumped or is vapor so the carb has not liquid gas to operate, headers, fuel lines too close to the exhaust, electric radiator fans instead of the stock type fan. Check those things, if you didn't find anything out, then do the fuel pump capacity test I have posted: for others on the forum.
Disconnect the coil wire HV lead and ground it to the intake so you DON'T get a spark, remove your fuel line from the carb and push a short piece of flexible fuel line on the line and put it in at least a quart size metal can, crank the engine for 20 seconds, you should have at least a pint of gas in the can, if you do great you are getting gas, if you have little gas (like 1/2 a pint) in the can then you have a fuel problem, either a plugged sock filter in the tank, a crimped or rusted metal fuel line, bad fuel pump, problem with the eccentric that drives the fuel pump, maybe a problem with the gas cap (it should be vented). If you have enough gas in the can, then either the carb has a problem, or maybe the engine heat is too hot for the carb, try a heat spacer, or figure out why it is so hot under the hood. Post your results. Good Luck.