I have a truck LS engine going into my 26 dodge. Actually it is already installed. I am ready to put an inline fuel pump.
The fuel rail has a return line. Does that mean I don't need an inline fuel regulator like I have on my other LS without fuel rail return?

 

No, you still need a regulator. I think your best course of action is to cap off the return at the fuel rail and use the usually short return line when you install the regulator close to the fuel tank.

Rick

 

Are u using a stock gm return fuel rail setup?

If so add your fuel pump inline, thin into fuel rail feed. Return from rail to tank. The stock oem fuel psi regulator in the fuel rail will work perfect. No need to aftermarket regulator or corvette filter/regulator.

 

Do this! Don't see why so many people are bent on using Corvette filter/regulators when their engine already has one. You can just use a regular EFI rated filter and be done.