Glastron Carlson CV 21 Restoration Project: Resizing Valve Guide 455 Olds

I'm working on my 1971 Glastron Carlson CV 21, which has a 455 Oldsmobile Berkeley Jet Drive. I wanted to replace the old, outdated valve stem guide seals with newer, Teflon seals. To do this, I learned you needed to resize the guides to accommodate the new seals. Here is a quick video on how I did it.

https://youtu.be/erVGWfnASZY