Reworking the 273 Adjustable Rockers

Rapid Robert said

Jad, VG info! To clarify: (1) you are drilling a hole in the rocker (& the shaft) inline with the underside of the rocker arm/valve interface? (the drillbit photo?) and (2) you are drilling the OE hole in the rocker on the threaded adjuster side further inline into the shaft at the right clocking (with valve closed) then closing the outside hole used to access it (same one Ma used to originally drill it) but Ma did not drill thru to the shaft at that clocking and that is what we are adding?. Correct or not correct? thank you for your time bro. RR

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RR Thank you for your post.

There is no drilling of the shaft. My shaft has the banana groves and 90 degrees from that on the pushrod side is a hole.

The only hole I'm drilling is the one under the arm on the valve side. it is 1/8 inch and is drilled at an angle to the tip.

No drilling on the push rod side. The hole is the correct size for the #8 tap. I do not tap all the way thru. I only cut 4 or 5 threads. I bottom out the plug against the adjusting screw.

To repeat I am not drilling into the shaft. On the push rod side I'm just plugging the outside hole to stop oil loss.

On the top I'm plugging that hole to stop oil spraying the inside of the valve cover top.
Then I drill one hole under the arm angling up to the tip of the arm.
As I have said this is how the W-2 rockers are setup from Mopar only they weld the hole closed.