First off Rick you still above water? You guys are getting it...
Recieved my first order over the weekend they only made one boob boob sent wrong filler neck. I also realized I need a cork gasket for the sender aren't they suppose to hold better in the stock tanks? I'm also going to buy a new set of stanless tank straps and new cushion straps. Sure easier now that I have a huge parts catalog at my disposal.
Combo cork/nitrile gasket, with Permatex 2 both sides, will not leak.
The gasket used on 55-57 pass gas tanks is still used today on heavy trucks. I bought an excellent sealing one from the local International Truck dealer had a part number of 356579C1. It was cork and sealed first time unlike the repo junk.