I just dug out an old Car Craft / Elapsed Times /Fall /2013 issue.One of the articles was about Reher Morrison's '82 Camaro with their then state of the art factory highly modified/ welded heads. Being the pioneers that they were they went in deep.They welded so much on those heads that they couldn't make the whole race at Indy with out doing a valve job before the final against Glidden. Some cylinders were leaking more than 50%!Rain came just before the final round postponing it til the following day giving them time to fix the heads ,as they never would have been able to beat Glidden without it. Alot of things to consider when doing that much welding ,for durability. It is an interesting read, though. Good luck whatever way you go. Bill