Dave,
I have another thought on my 50/55mph to WOT rich spike. After reviewing my latest chart, my primary jets are still a little rich. This is what I show with the same outside air temps:
70mph (3500rpms) = 13.6 A/F with 65 primary jets
70mph (3500rpms) = 13.8 A/F with 64 primary jets
I am going to swap in some 62 primary jets to see if I can lean out the 70mph cruise to get into the 14's. If this works, this should lean out my 50/55mph to WOT rich spike a tad. Then I will make a secondary squirter swap (currently Black/031") to lean it out some more if needed. I have .028", .025", .021", and .019" squirters to test.
If this does not fix it, then I will pull the high flow pv and swap in a standard pv of the same rating.
Our outside temps are now in the mid 90's so the A/F may not lean out enough.

Note:
FAST found an internal heating issue with my last A/F unit and they sent me a new complete kit. I have it installed and now I just need to get my tale out in the heat and test some more.

Thanks for the reply.