the casting date is when the block was cast, the stamped number is when the engine was assembled completely, they can be separated by quite a bit of time .... the LB will be the exact application, if anyone has that info

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