I installed a TF-2 shift kit. This kit suggests to grind the throttle valve. In my understanding this lets the lever down at the trans sweep a greater angle than stock.
On stock engine/trans combo the travel of the lever at the trans and of the rod at the carb are matched. They move the same amount from idle to WOT. When the travel of the trans lever is enlarged by grinding the valve, how should I compensate? Should I adjust the upper rod for WOT or for idle? Or should I modify my linkage so the swept ways are the same again (bigger than stock)? I.E. drill holes on a smaller radius in the bellcranks or such.

Problem with my car is, I adjusted for WOT. Those WOT shift points are ok, but at small throttle openings the upshifts are late and very harsh. Closed throttle upshifts occur at around 20mph (1-2) and 30mph (2-3). Haven't tried with disconnected linkage yet, that would be my next try.
Car is 70 Challenger R/T 440 with 3.23 gears, if that matters.

Thanks
Jens

Adjust the linkage until the light throttle shift points are to your liking.

I adjusted it in that direction, as far as my linkage allowed. Shift points got a little lower and a little softer but there's still room for improvement. Consequence was of course, that WOT shift points fell also. 2-3 gear change used to be at 75mph, now is at 68. So my guess is I must allow more travel on the carb side of the linkage to ensure the full movement at the trans.
I think I'll have to fiddle with it to get both good low throttle and WOT shift points.