when i stripped my engine down to clean up after a roller lifter failure, i bought a Wydendorf kit & fitted bushings to my lifter bores. The video of them doing it looked a bit agricultural but my machinist had a better plan in his cylinder boring machine. The job turned out ok but i'm just interested if any other members use this kit & have any experiances they can share. I've drilled a 0.040 hole in my bushes so i can go back to solid flat tappet if i need to. So anybody else using this kit?

I looked into them a few years ago, but they don't fix lifter bore geometry issues if the block needs correcting.

yes but if that was your issue, you'd be using an aftermarket block, not a stocker. As long as your lifter bores are within stock spec, this is the cheapest option to control oil bleed off with roller lifters which is what i'm trying to address.