47 model numbers and specs, 1.5T would be a 4000 series, 2T is a 6000 series and has hydrovac - I believe the frame will also be 'fishplated' between the cab and rear spring hangers on 2T

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