In this video we cover how to do your own 3-angle valve job on a Mopar Slant 6 head, but really it's the same for any engine, from a lawnmower to a big block. Doing your own valve seats really is no more expensive than having a shop do them, and with the quality I see out of machine shops today, I trust my own work far more than theirs. Links: Source for Neway tools (not sponsored or affiliated): https://www.cylinderheadsupply.com/ For a slant 6, I ordered Part #'s CU234 and CU205 If you have a different application, the size guidelines are here: http://www.newaymfg.com/cutters Marking fluid: https://amzn.to/3uoUD2M Lapping compound: https://amzn.to/3E0VES2 Lapping tool: https://amzn.to/3ULAGQA