Why the Sioux Valve Grinder 645 Still Rocks Today
If you've spent any time in an engine machine shop, you've probably laid eyes on a sioux valve grinder 645 sitting in the corner, likely covered in a bit of oil and metal dust but still looking ready to work. It's one of those pieces of machinery that feels like it was built to survive a nuclear winter. Even though technology has moved toward high-end CNC stuff, these old red Sioux machines remain a staple for guys who actually like to get their hands dirty and understand the mechanics of a perfect valve job. ...