Any adjustment to a kickdown switch for a 1969 Gs 400 switch mounted and gas pedal and don't reach the switch
You need to move the plunger to its fully extended position. More than normal. Then you press the pedal to the floor and it is adjusted.
Over time & repeated WOT blasts I've see the round rod attached to the gas pedal bend. Two things happen. You DON'T get WOT & the switch is then out of adjustment & resetting the switch does little or no good. I will usually put my hands under the rod attached to the pedal & pull up bending it back into position. Tom T.