I just bought a 78 js440 that had been torn apart to have the engine rebuilt. I put it all back together and everything works fine except i can't get any fuel to the carb. It looks to have a carb on it other than stock and i am not sure i have the fuel lines hooked up correctly. I have already replaced the check valve from the fuel tank and checked the diaphragms in the carb. Anyone have any ideas as to what is wrong?
Here is a picture of the carb.

Appreciate it.