OEM Rocker Arm Side Play

I’ve had these Mellings for over a year on the shelf, was going to put them on an aborted 90 W-150 stock 318 build, but gifted them to my sons 360 build to help him save some $$$, So far just a bunch of extra prep work, this may work, may not. Using an old shaft and valve grinding paste to mark where to grind, it takes some repeated mark and grind to get them acceptable. This one shown in pics is the last one, actually rechecked all and I had to do this on six total.

Never would have thought this would be an issue with factory style parts. How many slap this stuff on as is and roll?? I wonder how long they’d last until galling or ?

This is all that contacts the shaft
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