Stock is fine. I will say this though. The earlier 55-57, and maybe 54, rocker assemblies have not been available new for quite some time. The later 59 and up were made new by sealed power and trw for a lot longer (although I believe production stopped a couple of years ago) so not surprising to still find them new. I have always used a pinched off connector just to make sure that all of the oil goes to the rockers because to have them rebuilt is not cheap. The key to longevity in my book is good oil to keep the shafts from galling and the adjuster balls from wearing out. You might ask if anyone has an extra pinched connector for sale. I think that is the better play. Just a thought.
