Shift speeds

I fought with my KD and throttle cable for a while due to a flare up between 2nd-3rd shift.

Replaced TC and adjuated throttle cable and KD cable. I have no flare ups. Shifts are crisp but high mph compared to stock. I believe I have the correct speedo gear, its yellow... I counted the teeth before but it was a while ago.

Per google... stock 1st-2nd shift should be around 18mph and 2nd-3rd should be around 28mph. When I get my shifts around those speeds the 2nd-3rd has a flare up.

My 1st-2nd shift is at 22ish mph and 2nd-3rd is at 44mph. Tight 3500-3800ish stall TC (its a good TC one from GTX John). Cheetah vb and shift kit. Double wrap front band, 904 transmission rebuilt (Tony helped me rebuild it). 5.0 lever and 2.74 low first gear ratio (I think thats what it is called) 3.23 gears, sure grip rear end.

Do my shift speeds need to be brought down? I believe there is a governor in the tailshaft of the transmission? Is this what can be changed to bring the 2nd-3rd shift speeds down? Or