JEGS High Performance - Car, Truck, Street, and Drag Racing Performance Parts Summit Racing - High Performance Car and Truck Parts | 800-230-3030
The 572 is a tall deck block. You'll need a tall deck manifold or spacers to use a short deck manifold.
Asking what manifold is better is a loaded question. There are lots and lots of different manifolds to pick from. For a daily driver, you're not going to want a tunnel ram and for a strip only car, you're not going to want a low profile dual plane. Anything in between will depend on how you plan to drive the car and what rpm range the engine will be running in.
Best manifold? Hogan sheet metal. They're only about $3000. It's a full race tunnel ram but it is one of the best. Kind of like a ProStock intake with 4 split Dominators on top.
Any manifold can be converted to fuel injection. A Terminator system is the best way to go.
RON"S Fuel Injection Systems 
