You mean fuel regulator? The factory setup is to have a fuel pressure regulator on one end of the fuel rail, and a hose from that going to fuel return. I can't see why you wouldn't just use the standard setup. Normaly this will be at about 35-40psi I think.
Kits exist to bump the fuel pressure up to get more power out of standard injectors. But you are using 3T-GTE injectors on a non-turbo engine. I don't think you will max them out too easily.