of many TF trucks I've seen [mostly 235's] only 1 had the double acting pump [w/o glass bowl], although of course they might have been replaced sometime with cheaper aftermarket pumps ... also note that by 58/9 electric wipers were much more common

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