[dsraven]

before you start make sure your pedal has a travel stopper so the pedal stops at the same place every time when the pedal is released. usually this is a rubber block on the pedal arm that hits the firewall on the engine side of things. whatever your system looks like just make sure there is a definate stopper on the pedal that will stop the pedal at the same place each time, otherwise your pushrod adjustment will change each time the pedal is released. ensure the pedal linkage is aso free of worn parts that allow slop in the linkage etc, there are no parts binding on anything, the return spring is strong enough to bring the pedal back to the top of it's travel quickly every time. also, since the cab is now part of the pedal stopper, ensure the cab mounting system is also in good shape and tight
once you have that set and all is good then adjust the pushrod so when the pedal is let go and it is against the travel stopper you have a definate pushrod freeplay at the master cylinder according to the shop manual spec, or at least some amount of free play