Wot at the pedal is wot at the carb. At light and part throttle, the trans shifts between 1200 and 1800 rpm. At wot it shifts at 2500 rpm for 1-2 shift and 2800 for 2-3 shift. Seems pretty low for wot shifts.
The transmission doesn't know or care about engine rpm, the governor only knows road speed via the trans output shaft rpm.
The only way to correctly T/S your problem is to plumb in a gauge to the governor pressure test port and monitor the governor pressure at speed. The FSM has a Governor Pressure Test Chart for comparison. Typical chart shown below.
