Reworking the 273 Adjustable Rockers

that is the same HF set I bought, it was cheap enough & I dont tap that much. Seems like it want a larger drill size than the spec. But I'm gonna recheck my dimentions as I"m going in too many different directions right now. Jad if I can back up a step: (1) Should I drill a hole in the shaft on the valve side? (2) if so should I clock it with the valve closed? top rocker hole is closed and side rocker access hole that Ma drilled is closed with a setscrew. (3) Should I drill a hole in the shaft (in the pushrod/adjuster side)? (4) if so how should I clock it? I will checkout the trans dipstick tube as I have extras. I kinda figured the plumbing pipes was overkill! but it was the only idea I could come up with at the time. RR PS I will when I have time read back on your posts as you may have already answered my Q's. Thanks bro.