What happens if you leave the kickdown lever disconnected on the Powerglide?
I know that if you do this on the Ford c4 or c6:
1. The trans will not kick down from "hi" (3rd) to "lo" (1st).
2. Even at full throttle, the shift points will be almost 1000rpm lower, eg it will upshift at 3900 instead of 4800.
3. It will not damage the trans, ie you can run a c6 for years this way.

Is the same true for the Pglide?
Reason is, I'd like to leave the lever off so that it upshifts lower at full throttle, just to see where it upshifts, before I hook the lever back up. I just added a 4v carb to replace the 250-1v Rochester so I am betting the Pglide will upshift higher, but not sure how much higher. I don't want to overreve the tired 250 finding out where it wants the 1-2 shift to be.