The 17.5 gallon tank in my '55 started to seep fuel at the bottom, from the seam. I looked at several reproduction tanks and they were a much lighter gauge steel and had metric threads for mounting the sending unit. I decided to try and seal mine with POR Tank Sealer. It was a bit time consuming, but it worked out great. The entire tank is re-sealed, and it smells like it should in the cab and not like the back of a gardener's pickup.
