I'm using a Vaporworx PWM controller and an in-tank ZL1 module, so no need for a return. The controller uses a fuel pressure sensor plumbed close to the tank. I should be at 700hp, and at that level I could have used 3/8 factory lines/-6 fittings, but ended up buying some 1/2 nicopp/-8 fitting and will make my own. I had the controller set up to use Fast EZ EFI 2.0 TB, but am contemplating different systems now, so will likely need to send it back to Carl after I decide.
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