Thanks guys ,I took Glenn's advice and made the gasket ( fuel p/u plate) the sender gasket I had from having to re-order a sender with the right ohms when building the coupe. The fuel plate is larger and had 6 screw hole spacing and the sender is 5 and smaller.

It's back on and yet to be filled and checked. Someone mentioned not to ever fill the tank full,why I'm not sure. My roll over vent is about 5 in. above the tank top and using a full seal cap.

Again Thanks to all who responded.