Glenn,
Those are great shots. I'm glad that as a 15 year old you were so inclined to use your camera! I've been a student of the development of the MKII and MKIIs for some time, and your knowledge of that engine is impressive. Most people don't realize it began life as a 396 prior to the 7 liter rule. Mr. Dick Keinath, a senior engineer at Chevy, was responsible for the entirely new design. The engine shared the same pan rail as the MKI (409), but nothing else was interchangable with a MKI or the later MKIV.
I hope you find more photos to share.
Verne