Since my replacement tank was actually designed for a bike with a horizontal cylinder, the petcock outlet is located toward the front of the tank, unfortunately pointing right at the points cover on my cylinder head. There’s no way to make a standard fuel valve fit, so I bought some 3/4″ brass hex stock and made up my own threaded fitting. I now have to mount a hose barb fitting to the side of it, to make a 90-degree outlet, but I am waiting to receive the brass M8 to 1/4″ barb fitting I’ve ordered before I drill and tap the side hole.
It will get an in-line fuel shutoff, but downside to this arrangement is that the bike won’t have any fuel reserve (or fuel gauge) so the rider will have to pay careful attention to fuel range.