Torqueflite taking too long to shift into 2nd gear

You could always try to adjust the front band, but without knowing the ratio of the lever, cant say what to adjust it to. But if shifts are crisp and firm, and don’t have flare up or real violent shifts from band overlap, and like you said no sign of anything in the pan, probably just need to find the sweet spot where to shift the car 1-2 to reach your desired RPM.

I would also try to set up a go pro in the car so you can get more info. I’ve found that to be very helpful on not only what’s happening when going down the track with the car , but found things about my driving habits

An air shifter is also a great investment. I know my shift points are within 50rpm when reviewing the data from the grid.