Tubing the gallery with a twist

Ironmike,
I never ran anything very radical. At the time (early '80's?) I had a W-2 small block with a solid flat tappet cam in the .575" range. I believe I had an original kit from either Mopar or Hamburger. But it just turned out to be a lot more work than expected. Maybe I was doing something wrong, especially trying to get it properly peened, but it wasn't worth the trouble and not a necessity. I may still have a long drill and/or the peening tool.

Like the bushings, it would be possible to measure and drill the tube before installation. But everything needs to be "just right".