Ok... dunno if your outer cam piece looks like this
the outer step gets a small cut to allow the main linkage overlap and rest there when the center of the ratio is moved. So this cam just must be assemblied in one position...
but, once again, that's on my 74
the outer step gets a small cut to allow the main linkage overlap and rest there when the center of the ratio is moved. So this cam just must be assemblied in one position...
but, once again, that's on my 74