that VIN number is what was used back then, the engine number not the GM "vin" .... 32P is a CA designation, prolly just meaning "pickup truck" .... what you really need is the info off the ID tag on the truck itself
"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