rear shocks were only standard on the 1/2 and 3/4T, they really don't do anything on the bigger trucks, especially since they were intended to be carrying a full load all the time
"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