Lengthening the rod will give you delayed shifts... to a point. The factory way to set it as was said... Hold carb at full throttle and adjust the rod so the lever is all the way back against the stop. Then snug the bolt. (prob ought to first make sure when the gas pedal is floored the carb is AT wide open... if not, adjust the cable or mounting point on the carb to get it. then get the kickdown preliminarilly set. then drive it. You should have shifts around 26-28mph in 1st, 40-42mph in 2nd if all's "normal". If it shifts late, or down shifts when coming to a stop, make the rod slightly (like 1/8" or less) shorter and test again. It will not affect WOT shift points, but testing and driving can get it where it's comfortable. If you want higher shift points, replace the governor set in the tail housing with product from A&A.