Thread is 5 years old... I am not sure if the OP is still hanging around. PM him (ooops....'start a conversation' with him) and see what you get. Or, just follow KK's more recent thread links.
You can drill the 2nd set of holes in the shafts yourself. They are straight up from the bottom holes about 75-80 degrees up around the circumference of the shaft. See pix in post #29 here:
273 rocker arm adjustment
However, that may not be the optimum location; see how YR located them: look at post #37 of the same thread.
The size of that 2nd hole on my shafts are .125" (1/8").