Kickdown linkage

Well I dont have a tack and my speedometer is inaccurate, but it shifts to 2nd at 25, and 3rd at 43, then down shifts to second at 35. but that is by what my speedometer says, not my actual speed.

Also, Thanks for the replys and welcoming
Longgone, this is kind of what I thought but I didn't want to fiddle with it to much without somebody elses opinion, i'll probably give it a try tonight