MP's supplier said they didn't want to make those steel shim gaskets anymore. It went out for requote and took off like a lead balloon....none of MP's supply base is interested in making them. Volume must be too low or something? MP then superseded them to a thin Cometic, and that's why the price went way up.

That said, Mancini is looking into having the steel shims made again independantly of Mopar but I'm not sure where they are at in that process.

If you're absolutely, definitely going to run a 3.91 gear the .474 won't disappoint you. Any less gear than that, and I'd use the 272/455 cam instead.