Ram and Sam want to make sure their clutch isn't the weak link. Whatever abuse you might throw at their clutch, if the transmission breaks instead it won't be their problem. Typical clutch customer wants a clutch that doesn't slip when they put the power to it, they don't understand that a clutch NEEDS to slip a little for the whole package to come together.
2600 is just too much clamp for a metallic disc behind a mild 383. It will be hard to launch, also hard on parts. Before the NMRA Coyote Stock guys discovered the ClutchTamer, they were all the way down to 1100-1500 lbs of diaphragm pp clamp using the same basic Ram 900 series disc that's used in the Powergrip HD. They run 10.0's @ 3175lbs.