when using Crane Iron Adjustable Rocker Arms, wouldn't I need the Banana grooves on the shaft faceing Up, Not down like stamped rocker set-ups? with them down, the small oiling hole on the rocker arm will never be allighned with any oiling groove.

grooves facing up

grooves down

Grooves face down & toward the spring.

so little oil hole on top of rocker arm does nothing? because all it will ever see is solid shaft.

I am refering to the hole on the rocker arm. above the fulcrum, that you see in the first photo. I assume oil should come out of this hole , but with the grooves on shaft facing down, that hole is only riding on the shaft never coming near any of the grooves to feed it oil?

Face the grooves down. The oil will get there. If you put the grooves up you will most likely gauld your rockers.

...so a sort of follow-up to the original question...

I picked up a set of new shafts with my my rocke arm purchase (private sale, old but un-used parts)...these were somewhat pitted, mostly surface rust, etc, etc...but since I wanted to try my Crane adjustable 1.6 ratio arms I figured I'd clean these up and use them.

The shafts did NOT have the groves...so I marked them out, each wide enough to span the width of the rocker arm, but not so wide that it simply drains the oil out from under the rocker arm. But...I did not grove the shaft sloped (like the pics shown here), instead I simply cut the grove straight across.

I realize this is not ideal, but I figured it would be better then no grove at all since the grove would distribute the oil evenly across the rocker. Tell me though, did I screw them up? Does the straight cut introduce an easy spot for a stress fracture to develop? Should I have left them as they were?

Let's be honest, with a dremel abbrasive wheel there is only so much you can do...I kept the cut shallow, but attempting to cut the grove sloped on that round shaft surface was a NO-GO using a hand tool...