I volunteer time in a buddy's shop (both body and mechanical) trying to help him keep get his head out of the water financially right now. He does not have money to spend on commercially available VIN decoders. There are a LOT of free ones for cars, but I can't find any for heavy truck tractors. Ultimately, at times I need to see build sheets to help him with his estimates and also sound more knowledgeable when working estimates.
Can anyone point me in the correct direction?