curious about valve lash setting/check

70aarcuda said
look at the shaft on the left....at the top...you will see a notch in the end....notch is down along with the oil holes...

some aftermaket shaft may not have the notch...what is important is holes facing down...as said...oil flows better going downhill...

View attachment 1715425409

Nice catch on the rocker shaft notches, AJ.

Nice pics for the two different rocker shafts, 70AAR. I always thought that all the rocker shafts were the same. Note that the notch on the left shaft is not in line with the oil holes. Also, the oil holes are bigger. So I looked at an old shaft that came out of a 1972 340. It was the same as the right shaft in the picture. It has no notch, but it has a semi-circle machined in one end of the shaft. The semi-circle IS in-line with the [smaller] oil holes. This end goes to the right!!! When done so, with the heads mounted, the oil holes end up pointing to the floor. Also note the oil holes are clocked differently on the shafts compared to the shaft bolt holes.

From 1976 FSM: Rocker shaft bolts are 5/16-18. Torque is 200 in-lbs