The bolts that hold the intake to the head should be just like any other intake. On the plenum bolts I have no idea on the champ intake, all my SS bolt kits are for a stock intake.
Unless you mean a stock intake ported by Champion, then the sized would be the same as normal too.
I seriously doubt ARP would go through the effort to make kits for a IC turbo Regal. I probably only see about 4 or 5 of my complete intake manifold kits per year. (thank god. They're a PIA to assemble with all the different lengths and styles).