Ok, had a fairly frustrating day in the garage yesterday. I put the gas tank back in the car with the sending unit that I modified for the new pump setup. The EFI is setup to use 3/8" lines for the feed and the return lines. I had just installed a stock 5/16" return line with the last motor install so I figured that should be adequate. The return only carries 3psi, not sure what kind of volume, but it's free flowing so I'm hoping it doesn't cause a restriction. Just have to adapt the 3/8" hose to 5/16" hard line. So you try to explain to the girl at twilight zone that you need fuel injection hose, not just regular old fuel hose ( what kind of car is it for? Is it a 2 or 4 door?...UGH!). Anyways get the tank in and start to hook up the hoses and that's when I realize the replacement sending unit I used has a 1/4" return line installed on it. WTF?? Tank comes back out. Now I have to modify my original sending unit that I added the 5/16 hard line into. Of course it's all stainless so I can't get solder to stick. Meanwhile some other [censored] gets broke while I'm dicking around with it. CRAP! Two trips to the hardware store. I finally get it back together install it in the tank, back in the car. Get my hose run and everything clamped. Whew! Onward ho. Next up, pull the intake to notch the divider and reinstall. Then I think it will be time to drop the throttle body on and run the fuel lines to it. Stay tuned. (Pic is the 5/16 to 3/8 barbed hose adapter)