Big Pop,
I just re-read all your "help" posts and all the suggestions. If you tried all the fixes and nothing worked than I am stumped too. I think something is being overlooked. As other people have stated, the three main ingredients to running are compression, fuel and fire. We will assume you have checked the compression and it is OK. Let us also assume you have the proper ignition..no broken wires, fried points etc. You say that it will always start with starting fluid...it will always start under choke and that when you pull the fuel line off and crank the engine, that plenty of GOOD gas comes out. If you are convinced it is the carburetor, which it sounds like it is, then you have to confirm that you did everything correctly. Crank the engine until it starts then shut it off. You want to confirm the bowl is full... pull the carb top to be positive. If the bowl is full then it means that fuel isn't getting through the jets into the venturi, something IS plugged. A large vacuum leak could cause this condition..plug any vacuum line coming off the carb/manifold area. Just for grins, verify that timing is in the ballpark. have someone hold a voltage tester on the key side of the coil and make sure the old beast isn't going into "auto power-down". From what you are saying, it does sound like a carb plugging problem. Fuel things don't USUALLY happen all of a sudden...electrical thing usually do. Trouble shoot the carb AGAIN and make sure you have all the elements needed to run!

Stuart.