Longhorn pic please

[Spartan]

Appreciate any help on a pic of a 1969 or 1970 longhorn 4x4 with raiseed roof pads and hockey puck markers. (A napco or marmon conversion perhaps?)

I know this would be a hens tooth so if nothing comes of it...

Backstory: I was BSing with my stepfather. Said I'd like to build one with propane. He said he had a friend who had a neighbor who worked for a railroad...you get the picture. Question is does one exist and if so a picture will tell it 1000 times.

Thanks