The magnum I just pulled from a 1994 van only has one line and no regulator on the fuel rail so they must have used the regulator in the tank on some of the early ones as well
The regulator is not in the tank, it sits on top of the fuel pump module on top of the tank. the fuel line is connected to it with a quick clip connector. Stainless piece about the size of a cat food can. It also serves as the fuel filter.