700R15 Yokohama 10 ply, about the tallest narrow radials I found .... but you won't do much for mileage with tires, you might look for an original 3 speed overdrive or spring for the 3.38 rear gears from Patricks

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