Yeah, I figured I should be getting better economy than what it is.
Would you mind posting a pictures of your set up? I'm using whatever pump came with the Tanks Inc kit, I believe a a Walbro and their 3/8" fuel lines. Would an adjustable FPR work? I don't see why it wouldn't.
Here's a pic of my tank and the fuel lines. I can't remember the brand of hose and fittings I used, maybe Earl's. You can see I got quick connect adapter fittings to with fuel regulator.
The third pic is the filter / regulator mounted above the diff. If you look closely at the regulator you can see I plumbed it into the stock 5/16 line.