numbers I can get from my local NAPA:

outer - Chicago Rawhide B67 [orig B01] / inner - SKF B52
or NAPA outer - PGBP B67 / inner - PGBP B52
front grease seal [inner] - CR 18772 [NAPA 49412]

if you can order off the net, try Rock Auto

I don't think the roller bearings are an advantage, some folks think they're better but these trucks have done fine with the ball bearings for many decades

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 & Rust-a-holics Unanimous parking lot