Why did you scribe them? or did you decide they weren't worth messing with after scribing... West Coast Said they don't open em up on stock mods, but the in house cnc'ed units are supposed to be slightly larger, just trying to gather as much data as I can b/c I'll be doing mine shortly. Like the truck is going back together the weekend b4 xmas lol.
2008 CCSB Z71 - custom ground cam, new valve train, custom heads, CAI intake, Nelson Tune, headers, fake cats, electric cut-out, transgo reprogram & servo