I just talked to a neighbor who was a diesel mechanic.
He has a bore micrometer at his garage. Once he retrieves it we will know. I almost went out and bought a set. He said his device measures the bore directly.
What I really need now is a sand blaster.
Thanks

email (option): cbhaws@verizon.net

This is how it should be measured to accurately determine the degree of wear...Ian

email (option): ian@wright52.plus.com

Ian,
Thanks! I wish I had a tenth of your knowledge.
Thank you so much for helping me in many ways with this project.

email (option): cbhaws@verizon.net