The last time I had to do this it was in a 283. Easy stuff.Just put a socket on the pivoting nut and turn it while listening to the motor. But a 235? I have to get the screwdriver into the slot of that stud that is moving up and down,back off the adjusting nut and then turn the screw ,all the time with the tools and my hands moving up and down with the cam action. There has to be another way to do this. Is there? What is the trick? Gratefully I only had a minor adjustment to make. I can't imagine having to do this twelve times.---Jack