273 Rockers on a 1971 340

nm9stheham said

The whole rocker oiling setup is a bunch of leaks made to just get dribbles of
oil where needed LOL .... which is why it starts to fall apart with high RPM use.

What I wanted the OP to know is, if he put in banana grooves and got one a bit wide, then don't freak out. He says he is not pushing this engine hard.

Click to expand...

According to yr if you lineup the hole in the rocker arm and the shaft, oil will squirt out. That is a high on the shaft hole for oil to squirt out of not a low dripple out hole.
I don't recommend the op over slotting the shaft to the point of leaking out the side at the bottom.
That is unless he doesn't mind dry startups after the oil leaks out of the shaft after it sits over night or over the weekend.