I saw the original post date and had to skim through your thread. Pretty cool, but sucks you haven't made a power tour yet.
I did a short haul in my 65 Mustang in 2014, I think I made the first 3 stops, my wife and I did the entire thing in 2015 (around 3,500 total miles) and I ran the entire tour by myself last year (around 3,500 total miles again) because she refused to go to LA/TX/KS in June. Glad she didn't go, I would have had to put her on a plane by the 2nd day. It was 105-110* every day.
The only reason I'm not going this year is my damn job took away 2 of my vacation days and moving them to a forced week off for Christmas. I have 10 days for the entire year and already planned a 6 work day trip (9 total) to Cali.
Anyway, do whatever you can to make it. It's unreal. This years route should be some beautiful driving and not hot as hell. A little bit of the route should be similar to where we went in 2015.