does anyone know what the gas lines are spost to be, i didnt buy it with an orginal gas tank and theres 3 hose lines the filler neck and next the filler neck is a hole which i think the fuel level unit goes into.

so what i need is what the 3 lines(which is return, main, and evap.) are and the hole on top.

 

Download the FSM in my sig line. The 79 manual has decent pics, the 85 manual has a good line drawing of the entire fuel system.
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know any good online stores, for a fuel level sensor and a vapor check valve, and where does the vaper tank lead to I cant find where it goes?

 

Pictures here. http://intertron.com/ron/tank.html

Mazdatrix has new fuel level sensors for $70-$100.
http://www.mazdatrix.com/c-pump.htm
Much cheaper to buy used parts.

What year RX-7 are you working on?

 

1979-12A 4 barrel carb.
i'm more concerned about the vapor check valve and the vapor tank and the connecting lines to the vapor tank

 

what direction should the fuel check valve in the engine bay be pointed, i can bow in the part facing the engine, but not the oppisite direction

 

You should be able to blow towards the fuel tank, not the carb.