84 Century Bronco gas tank

[DanLeonard03]

84 Century Bronco 140 I/O. The fuel level sending switch has stoped sending. The floor is sealed, and I am thinking about sawing a hole in the floor to access the sending unit. Is there a diagram to help me locate it or some other way to locate it so that I can just cut a small access hatch in the right place and not cut up my whole floor? Help appreciated. Dan