everything I've ever seen says the 248 was not used after 55

re the 635 - seems to be a rare 60's 637

GMC V8s [scroll down]

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