Hi Gary, as I mentioned to you, in 1969 while riding my bicycle on Bishop Hollow Rd (Newtown Sq.) I saw an orange with black stripe Z28 power sliding into the Sun Oil R& D facility. At the time I didn't know it was Mark, but Bill Scott confirmed to me years later that it was Donohue most likely picking up parts. When Mark passed away in Aug of 1975 it was a very devastating time, and I set a goal to find a 69 Z28 identical to the one I remember Mark driving. It took a year (1976) but my first muscle car was a 69 Z28 hugger orange with black stripes. Fast forward to 2010 and there it was, more confirmation in this book.