The a/c does not work, never has. The ac clutch on the compressor works but the system is not charged. It needs charged, new hoses, a dryer and a new condenser... its a project for another day...
Just to be clear, and fair, what you're doing isn't uncommon. None of us like dealing with the governor and band adjustments are only slightly more enjoyable...
If it works, it works. But since you do drive it so much (much more than most of us, I'm jealous) it's a good idea to make it "right." usually people want the shift to happen later, higher (5500+ rpm).
What do you consider a "high" part throttle shift and "high" WOT shift (in rpm)? That's an important part of the equation.
Many want WOT to happen high (5500+), part throttle a little lower (4-4500) and light throttle to happen in the 2500-3500 range (+/- depending on actual combo and gears).
You can deviate from this, of course. Just make notes of what you want vs what you have and then call the vendors to see what they recommend. Or you can get creative with used slant six governors and try to DIY it with some tinkering.
