Rocker Arm to Rocker Shaft clearance?

[bhabben]

Folks,
What's the clearance between the rocker arms and the rocker shaft they ride on when new? Mine are severly worn, and am digging through boneyards for a good set, but need some sort of guide to know when I've found a good set. It's been a long time since I saw a new set, and all the sets I have are worn.
Thanks,
Brett

 

[MeanBuicks]

Skip the scrapyard on those.

Do your engine a favor and pick a set of these up.