So after some research on the Cat D11 I found a great website for finding specification numbers for equipment. Thought it would be helpful for anyone working on a scratch build and needed some numbers for a conversion. Just go to the website and you can research any type of equipment ranging from agriculture to construction and even forestry equipment. Anyways hope this helps with your conversion scratch builds. I'm putting this in the general discussion but if anyone feels it would be helpful in other forums feel free to post it or move it.
http://www.ritchiespecs.com