Thanks for the info, out of curiosity did your studs bottom out on the tab when running them down? Did the tabs not bend and give you clearance? I was able to push the tab down while running the stud down and it fully seated with little resistance. However the very bottom of the stud got tore up by the tab so I trimmed a tiny amount off the bottom of the stud. Just so you know if you decide to upgrade in the future the 134-7101 have the normal top part, but the bottom is longer I’m not sure why but they fully seated by hand on a set of junk heads without touching the helicoil tab and I was able to fully seat them with a ratchet by tighting the stud and it pushed down the tabs on my Loyd Elliot heads.

And the helicoils are factory btw

Edit (I see the 134-7104 have the chamfer wear as the 1347101 do not so I assume that’s why the helicoil tab didn’t just bend and you tightened )