Thanks for the replies guys! A Cat it is! Any idea on year model range? I thought it could be an IH based on pics I saw on the King of Obsolete"s site over the years.
Funny how if I had a pic of my five year old anywhere near that equimpent my aging parents would scold me for being irresponsible. I guess grandkids are more valuable than the originals.
I was just five at the time but spent hours watching that guy run the dozer. Then later when a guy dug the septic with a back hoe, I watched too.