A727 Shift Speed vs RPM?

I have a 69 Chrysler 300 with a 505ci, A727, 2000rpm Stall, 3.23 Sure Grip. When I floor it, the transmission shifts from 1st to 2nd at 40mph and from 2nd to Drive at 70mph. Transmission rod is adjusted so that WOT has the rod pushed all the way aft. These shift points are in the Normal operating range per the Service Manual.

I'm using the cars speedometer and a VOM/Dwell meter as a tach to get the following rpm vs. speed.

1st gear - 20mph@2100rpm, 30mph@2950rpm, 40mph@3900rpm
2nd gear -...

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Author: MJFUR