The bell crank that mounts on the intake has three holes, two in the bell crank & one in the mounting bracket... slide a drill bit (I think 3/16") through those holes to lock the bell crank, now set the lower linkage length by adjusting the vertical rod so the throttle lever is all the way forward..... Next set the link from the upper bell crank to the carb so when the throttle is wide open the transmission kick down lever is fully rearward..... This will get you very close, from there you can make small adjustments to tailor the shift points..