Smith bros or manton and replace all of them in the correct length. That's what I think. Those look like 1-1/2" and that's too long. Get a set of 1-1/4". And these new ones will have a larger hex in the end. Mo better.  The one oddball adjuster there is the factory original adjuster for those rockers.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
| 
