Threaded studs with oil passages
 

I ran across an add in a car magazine for "1955-1960 Pontiac Threaded Rocker Studs Drilled for Oiling" from California Restoration Parts (877-504-8124). Couldn't find the parts on their web site. The phone number listed is 877-504-8124.

Just passing along in case anyone on the forum wants to keep their stud oiling, but upgrade to thread-in studs.

I recall seeing them on Ebay some time back, but when I tried to search for them again, they were nowhere to be found.