a 3100 is always a short bed 1/2T, the 3600 3/4T was always a long bed - check the resto packs of the years you want to compare dimensions

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