That's the strange thing about this deal Rory, nothing shows any signs distress. the rocker arms are fine, as are the shafts, pushrods, and even the adjusters themselves "look" ok except for the wear. No bluing or galling. That's what led me to wonder about the hardness of the new adjusters I put in. The lifters are Crower "cool face" solids and the pushrods are Comp Cams 9.157. With the set-up I have they do put the cups pretty close to the bottom of the spit hole in the rocker arm. I don't remember who's shafts they were, ( I bought them 20 years ago ), but they have one hole on the top and one on the bottom, but again they have several hundred quarter mile runs on them with no problems. And I have studs, properly necked down. Thanks......Jim Kramer