HIGH DESERT Z

Looking for information from the Z cars racing glory days. I live in Indianapolis, and if my memory is clear, there was a Datsun dealer in Indianapolis by the name of "Jim Campbell Datsun", it no longer exists under that name. I think they sponsored a driver by the name of Logan Blackburn, a contemporary of Bob Sharp and John Mortn in the early Z car racing days. I would appreciate any information concerning logan Blackburn or Jim Campbell Datsun, or if anyone has any idea how to contact Logan Blackburn. Irecently re-purchased a Z that I had owned 20+ years ago, that was supposedly owned by Logan Blackburn. Any input would be greatly appreciated!! Thanks, John 1972 1973 1978