Agreed, great pics. If the last batch of pics were taken at the same race, I believe it may be 1967. The Sterling plumbing car (4th pic) came out of retirement that year as the #3. The photo you refer to is, I believe, the Lang #28 driven by Mickey Shaw and was out of Mich. It does look like it could be a Wally car, but I really don't know its history.