If the pump was drilled Tom, the cushioning effect is reduced. It's commonly described as what it does "firmer Converter clutch apply". Many believe that must mean a pressure increase.
In your truck, the apply feel is determined by more than 1 factor.
Another factor is multi discs and clearances. More discs in less space = a firmer apply. A shift kit all by itself sort of
. You have 4 factors I know of affecting TCC. The unknown is when it applies
since you have TDE-1 programming or a chip could be overriding. The PCM either commands Tcc On or off in your truck. The 4R100 in Diesels have the pulse modulated apply, designed to be softer by adjusting pulses. No pulse adjustment in your truck. The benefit in my op. is you need not worry about programmng applying your TCC without enough pulses. If you can picture a brake pad against a rotor wearing away, that would be my concern of the wrong pulse apply on the TCC from programming in a 4R100 behind a diesel. I'd consider your lockup a plus unless it's spilling your coffee. Then the cover and piston need to be up to the task as well. 1 of the factors inside would than need a change, meaning pulling the unit.