I still have not decided if I am going with a factory new or something like a BPE engine. I did speak with BPE the other day and I told them I am just about to close up my fuel tanks. They told me regardless of my engine choice that it would be a good decision to install fuel return lines into my tank just in case I ever end up with electronic fuel injection. In the case that I go bone stock, I can just cap these connections off, and that seems like some pretty wise advice.
I plan on putting 3/8s AN fitting near my vent line in order to service fuel return. This basically looks just like the vent line, but with a larger fitting to match the flow of the pick-up line. I looked around on Vans for a while, but I did not see an anti-rotation plate for 3/8s fittings. Back to the mill!
There is nothing really earth shattering here. I drilled a couple of #33 holes to have a close fit for some 4-40 screws to hold down the sheet to a scrap delrin block. I will later drill these #33 holes to #30 in order to rivet the plate to the end rib on the tank. From there I milled out a hex pattern to accept the AN fitting.
About the only annoying thing here is that I don't have a CNC. I have gotten fairly decent at running 45 degree lines by hand, but 60 degrees I have yet to master.