Tom, see I told you so; open a corvette garage once you got the lift installed. You already have a customer (Gregory) so interested in your services that he is willing to drive all the way from the Chicagoland area; your reputation is spreading like wildfire. Must be your competitive prices, warm personality, and knowledge of corvettes.
I have been viewing the various lift postings over the years on the forum and your pics show that the lift posts of the Pro Park 8 do not extend vertically to the overhead door. I noted that your access door to the house is about 18 inches above the garage floor, and the ceiling about 12 to 18 inches above the top of the access door. What is the heighth of your garage, floor to bottom? It appears that you have sufficient space to install the lift without coming near the ceiling. I looked at the specs of the Greg Smith lift and it was 81 inches from the ramp to the max lift. My basement garage heighth is 84+ inches, and I have been wondering if the lift would fit. Even if it did, I could not stand up and would have to squat while under the car. That would be very uncomfortable. After adding the heighth of the corvette on the lift, I doubt if I could actually install the Pro Pack and have room to work. I know I can install a Kwik Lift, but I dislike working on my back and twisting it into all kinds of knots. Also, you had previously said that the lift would allow you to park your truck under the corvette, so you must have enough room, although your pics don't indicate that this is possible. I, along with many other CACers, appreciate you taking and posting the photographs. The pics are very informative and have made me think again about getting a lift.
Barrett