Chevy Express 6.6 Gasser reliability

Hello, I can’t seem to find much information about the 6.6 V8 Gas Express. I’m looking for a motovan and spend a lot of time in the mountains, so I was thinking that the 401hp 6.6 would be badass. I’ve seen a few used.

Are they reliable? Are they much faster than the 6.0?

I’m between the 6.6 and 6.0. Thanks!

In my opinion, they’re pretty reliable so far. I had to repair two flat cams around 95k miles under warranty at the dealer, but both repairs were on Express vans out of the hundreds in my area. Otherwise, no issues. Both the 6.0 and 6.6 are good; I’ve rarely seen major issues with a properly maintained 6.0.

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