Originally Posted by ssmonty
Did you check to see that the pushrod was clearing the end of the guide plate slot? You probably know that the 1.65:1 ratio moves the pushrod closer to the rocker stud(bottom of guide plate slot) than a 1.5:1 ratio rocker does.
I didn't check. My bad. I'm guessing the step on the push rod end was catching on the guideplate.