Thanks again for your help. I went back out to check, removed the LF wheel and could not find any indication of numbers. The frame on my truck is very clean considering the age and a only a very light layer of dirt and rust, easily removed with fingers or brush so would think any numbers would heve been easily visible.
As pointed out by another member and after measuring the engine, this is a 1 and 1/2 ton or 2 ton truck, not larger. So i still wonder if numbers for the larger (non-pickup) trucks is in a different location.
Also curious about the tag found on the upper left corner on the fire wall. Is this some kind of code for paint / upholstery?????????
I will continue to explore my new truck between the roofing and other house projects.
I have not been able to upload photos.