DryLakesRacer (1/5/2019)I have both the regular one and the beehive spring one from Summit. I actually had to drill out the first 1/2" of the beehive one to have my retainers sit flat.
Is that all there is to it, to make them work, is drilling the ID larger? That sounds almost doable.
They are listed as Valve Spring Micrometers. And there are different lengths. Mine both go to 2.100" and I've never used them on a Y.
I know what they are called and that they have different sizes, the idea generally is to find one specifically that is known to work on Y Block heads without any major contortions on my part.