I have read and re-read this article for weeks. I am so happy to have found this resource. I never expected to find anything this exhaustive when I set out to search the internet for tips on optimizing my 351 Cleveland 4V rebuild. I only hope I can find a builder for the heads that will adhere to the information in this article. I have found that builders have their own ideas about what should be done and they are not that open to input. Anyway, thank you for sharing your experience and knowledge.