Mazda Forum - Mazda Enthusiast Forums - 94 Mazda 929 Fuel Line diagram or location

If fuel is pooling at the bellhousing area then you should be concentrating on the fuel lines in the engine compartment.
The fuel lines come up into the engine compartment at left rear corner of engine compartment and then over the rear part of the left side valve cover. The line more to the front is fuel return and one to rear is fuel pressure from the pump. I would be looking at the pressure line first as it is more likely to leak and crosses over the engine rear right above where you are seeing the fuel.You may be able look at where this line goes by using an inspection mirror but may have to end up pulling the intake manifold as all of the lines, connection, pressure regulator, etc and fairly buried under it.
After the fuel line comes over the valve cover and under the manifold it connects to the pulsation damperat inside rear area of left valve cover, from there the fuel travels forward along the left bank fuel rail to a crossoverpipe across front of engine andover to the right bank fuel rail where it flow backwards to the pressure regulator. From the pressure regualtor a flexible line travels straight accros the engine to connect up to the fuel return line at the rear of left valve cover. Also note that there is a separate line that comes off of the fuel pressure regulator up to the cold start injector that is attached to the right rear of the intake manifold above the #5 spark plug area.