Technical McGurk rockers for Olds 303

Came across a set of early olds mcgurk adjustable rockers but they need the adjusters. Anyone out there have them or know of a substitute that would work. Thanks!

 

Never mind I’m sorted!

 

Guess you figured out the thread and size. Nice that now you can get both styles..

 

Actually I found complete set but might be good info to have? I appreciate what ya know.

 

I don’t know what McGurks had. Thomas magnesium ones used 3/8” fine for a GMC 6. Both the ball and female socket styles are available from rocker arm manufacturers.

 

I've got most of a set of the Olds magnesium rockers, stands and shafts. Yes, they do need some adjusting screws. PM me if you have some or want some.
jack vines