[markjohnson]

Due to the popularity of crate engines these days, GM now contracts the engine assembly to an outside sub-contractor. I think they're called Performance Engine Assemblers, or something very similar to that name. I've seen photos of the facility and it's not somewhere that I'd spend big money on an engine from. Sorry to hear about your start-up problems. Looks like you spent much time and money dressing up that ZL1.