You wrote:
"1-4 are connected by a T connection that goes to the front of the engine. 2-3 are connected by a T that goes to the vac connection of the petcock. i think mine is internal venting."
I think the fittings you are referring to are VACUUM ports. These things must be plugged or connected to something. On later Kaw models, the hook up you describe is fairly typical. Normally, 1&4 are connected to a tee and the tee connects to the smog valve. Normally #2 is connected to the vacuum line going to your petock and #3 is plugged.
The venting on your bike is via holes in the sides of the carb bodies. The holes have a tee fitting and there should be a hose connected to your tee. The reason for the hose is so that if the bike overturns, gas won't spill out on the hot engine. NOTE that the vents MUST be unobstructed. The lines must not be pinched. These vents can vent into an airbox or hang over the swingarm but essentially, must be free to breathe or the float system will act funny... no gas or flooding... I will attach a pic showing vents and the vacuum lines.
Also, keep in mind, that even on prime, if the tank gas cap venting is obstucted, gas won't flow out of the tank. If the venting in the cap is partially obstructed, gas flow will be inadequate to keep the bike running but a trickle of gas might come out. The bobowls are just not filling.
Last, to check the fuel level, put the bike on centerstand but note that the front will be down some. Pick up the front tire and put a piece of wood under it to level the bike.