[jorgensensc]

Thais next part is optional, but I suggest you consider your options

The filler neck on these tanks is 1 3/8"
There are very few if any filler necks that small (unless using original filler neck)
You can try and reduce the filler neck you use down to 1 3/8", but I found it IMPOSSIBLE to find Fuel Filler hose that would fit this size neck.
The solution was to increase te size of the tank neck to the more common 1 1/2" Filler hose size. I used the exhaust adapter(PN 17519). I cut it in half at the indention, then had it welded at the indention (closest to tank neck size) to the tank inlet(Yellow Circle) Please don't think that you can just stretch this hose over the end, it doesn't work!!!!!! After fighting with it for an hour, I finally had the shop use a pipe expander on the hose to get it to slip over the tank neck. After that I just clamped it on using a 1 13/16" - 2 7/8" hose clamp.