I recognized the base vehicle immediately. A one chance try on Google "BMW Isetta 600 Hot Rod" gave me the answer.
It was a "Cover Car" on the April 1967 issue of Rod & Custom Magazine.
By the way, as I am now so close to Professional status, you did not yet award me the point for the answer.
I would appreciate the point.
Edit: OOOPS, the point has now been posted and thank you!!!
Bill