i am restoring a 1966 el camino with a powerglide. I hooked up the downshift linkage to the carb and noticed that when I move the rod that connects to the bell crank, it does little or doesn't move the bellcrank. How does this affect the upshift and downshift of the trans? the linkage rod that connects to the carb is slotted at the end and the other end connects to the bell crank. thanks for any help you can give.