Went to adjust the valves on my MP 426 crate motor and 2 of the adjuster screw lock nuts galled on the threads.Went to order new adjusters through summit and they offer 2 sizes 3/8-24 w/ 5/16 ball and 3/8 24 w/ 3/8 ball. Their web site says the 3/8 ball is correct for the Hemi BUT the adjusters in my engine are the 5/16 ball adjusters. Which is the correct adjuster for a hydraulic cammed hemi? Thanks, Charlie.