The 396-427 crank will make it a 427+.030 with the correct pistons. You will have to use closed chamber piston. If you use a factory 427 closed chamber forged piston it will hit on the head around the exhaust side of the piston. As these pistons were designed for the rect port heads that were more open in that area.
You will be able to rev the thing 6000 rpm with all factory parts. Just a re-bolt and resize job on the rods. If you can get the labor $$$ low. The heads will respond to a 2.19/1.88 combo. If the bowls and shrouding on the intake wall are correctly delt with.
It is wise to run a roller cam on these. Modern oils and the seat pressure/ramp rates make for short lived hot rod flat tappets..