[Streamsaver]

I am in the middle of the same repair on a 68 overlander right now. We replaced part of the floor from the rear wall to the first frame crossmember. Used marine grade plywood and attached it to the remaining floor with west system epoxy and about 8 biscuits. We also had a new galvanized tank pan made. It has a lip to screw it to the underside of the floor, then two 1inch wide metal straps bolt to the frame and actually support the weight. For insulation the tank sits on a white foam block shaped like a big flat lego peice. I can take a picture of it tomorrow.