I have one of these in my KMP Husky mounted right where the fuel level indicator would be on a cub.

http://www3.towerhobbies.com/cgi-bin...?&I=LXEXX1&P=7

It works out really well, because if the tank is above the carb like mine is, it puts a "high" spot so you don't get the flooding that sometimes happens.

I made a bracket out of light ply so it would sit just inside the cowling, then glued the bracket too high.

Not too bad though.