that number is for a GMC, not a Chevy - just as the tag sez grin

find out about GMC numbers here - either your title is wrong, or the cab has been swapped onto a Chevy .... should have a hood nose piece that says "GMC", and a lot different grill than a Chev, check the gallery pictures - that number will be a short 1/2T made in Pontiac

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