I am selling a 1973 GMC Sprint for a friend. We are trying to find out if it is an SP or not.

Below is a picture showing what is on the cowl tag. What kind of information can you guys decodes from this cowl tag?

The VIN is 5D80K3B502392. What can you all tell me from that?

Also, where might I find an axle code?

http://www.supermotors.net/getfile/539213/fullsize/sprint-body-tag.jpg