01-29-2017, 10:10 PM
I spoke to a gentleman from U.S. MoPo a couple months ago. He took time to talk about the 820s , cant remember his name. He told me they had an intake like the Copperheads they were testing with the new head gasket , that was more like a gasket than a shim, .055 thickness. He said it sealed better than the ole style. From what I remember the dyno needed repair.