I hate my Vortech 12:1 FMU, I want to increase injectors and put a Walbro 255 intank pump in and remove the fmu, and inline pump.

What size injectors should I use?

Do I need a RRFPR (rising rate fuel pressure regulator)?

If so, which kind?

What else do I need?

Currently installed:
DRAG III Kit
AEM Fuel Rail
Apexi S-AFC
Apexi N1 catback
Progress True Coilovers
98 LS Auto