In post #18(thanks Form), the one on the left in photo(shell covers roller) is like the ones GM has used since the 90's.
No way would i use the style on the right.
But must say we'v had quite a few failures with the active management HRL's on 2007-2020(newest was a 2018 two moths ago) 5.3's and couple 6.2's.
Usually just 1 or 2 lock up and bend push rods.
Keep 2 sets with assoiated parts on the self.
Even had to replace 2 cams that only had 1 worn lobe so far this year.
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If you cant drive from gas pump to gas pump across the map, its not a street car.
http://s207.photobucket.com/albums/b...hop/?start=100
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