Ah, I was thinking it was out for some reason.
Generally besides TP pressure being off, the governor spring and valve weights control shift points.
One easy trick we used to use was to cut another governor spring in half and screw it into the original spring. (this was the simplest way)
The other was to grind down the valves in the governor to lighten them.
Another way is by using line pressure.
This is the overall pressure the trans uses, and raising the line pressure can also delay and firm up shifts.
Most shift kits instruct to raise the line pressure, but doing only that without the related springs from the kit in the valve body can cause other issue's.
If you are planning a kit, don't change anything on the VB until after the kit is in and test run along with any TP control adjustments involved.
THEN if you need more tuning you can go from there.
The spinning output shaft tries to throw the weights to the outsides of their bores to cause the next upshift.
TP fluid fights that centrifugal force until the driveshaft speed gets high enough to overcome it and the trans shifts.
So lighter weights or a stronger spring resists that longer in the output shaft speed causing higher mph and firmer shifts.
Keep this in mind if after everything you do doesn't help, or help enough.
Here's a Hot Rod article about governor weights and the mods we used to make.
https://www.hotrod.com/articles/mopp-0208-increasing-shift-speeds-on-the-727-torqueflite/
