One thing I really like about the 73 up GM medium duty trucks with the standard small back glass in the back of the cab reminds me of the 60 to 66 GM cab backs.
I grew up on this lake we used to dock my fathers boat at Mark coppers house in 1990, sadly at the end of the summer he was having a party and let someone fly his seaplane that he also had and the guy flying tried landing in front of his house hit a wake the plane flipped an mark drowned unfortunately,he was so nice to me and my father as my father just broke his hip and was going through a nasty divorce with my mother but he treated us like family,let my father dock the boat at his place for free and he used to take us up in the plane all the time!RIP Mark still think about you all the time and your generosity!