Your kick down linkage should have a big impact on your part-throttle shift points. And the gov will impact it a little also, though not as much. Where you get your best performance manual shifting is where you should set your gov shift point at. And you can change the gov by just pulling the tail shaft and popping out the snap ring and e-clip. Oh, and your line pressure will affect the shift point. If you are not sure which gov to get from A&A, get a couple, they will allow you to return the one you don't need.