Oh and back to my original problem re-stated:

My '46 HAS an existing Ford tank (so I'm told) of some kind located between the rear frame rails. The fill hole is on top toward the middle. I COULD keep it and WOULD keep it if I could figure a way around my problem, The fuel sender hole uses some kind of collet to hold the sender in. I guess you put it in there and twist and it holds(?) Butthe gauges I bought came with a fuel sender that is of the GM or Universal type with 5 holes around the perimeter. Is there any easy (cheap?) way of adapting what I've got to work together? Anyone know a solution?