curious about valve lash setting/check

****, my apologies to all! I thought the shafts were opposites, not the same. that's why they have to be in rear on the passenger side and in the front on the driver's side? :) same shaft set-up with the oil holes, just reversed on each side to accommodate the oil holes? well, I may have problems then, because the notches are both in the back.

Yeah that's incorrect. That's why we always try to use the notches as a reference if they have them. Just remember, passenger side down and to the rear, driver side down and toward the front and you got it. The oil holes will be in the correct position with the notches oriented like that.