They aren’t “Isky” rockers........ although at one point Isky was selling the Crane rockers.
The actual Isky rockers have a distinctive look:
I have a set of those also that I am going to keep. Mine are not bushed. Did you.do that or RAS?
I think the other set must have been made by Crane for some other cam company to market. Who knows when the adjusters were.swapped. I found them when I was looking through stuff that I have had forever. Need to thin out the stash of old stuff that I will likely never use. I will have a pile of old parts in the 4sale section soon. Some used some never used but most are approximately 40+ years old.
That rocker is mine and yes I had them blueprinted,bushed,re-directed oil passages,trimmed down,and new hardware installed by RAS about 6 years ago and still going strong
Cost me about $500 with shafts .
Gus