I recently tore out the bathroom floor in my 94 5th, removed the awful looking canvas wall. installed a new shower wall and I dropped the floor approx 6 inches, built a box and fiberglassed it drilled a drainhole and painted with gelco, the walls were covered with
fiberglass re enforced plastic panels, recently installed a shurflo 2.8 gallon water pump underneath, and will hope for the best Paul