[Canuck]

The box codes are from Inspectors guides and assembly manuals. I have inspectors guides for most year Oldsmobiles and the codes for different componemts show what would be seen in the boxes on a broadcast sheet for an Olds for that particular year. For example in box 12,for Steering knuckle, oldsmobile used code OM for option code Jl2 disc brakes. I am sure different plants and assembly lines had their own codes. These inspectors guides come up on ebay from time to time. I suspect the really good restoration shops or individuals that specialize in a particular car would have them.


Paul