the under seat tank was done with the Deco series, AD tank behind the seat or on the frame, see the Master Parts Manual here, says 37-46 1/2T all the same, although there may be other tanks in that same year range that would fit

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics