If you are going to squirt the fuel into each port at the correct time you need a different distributor. Best distributor for that would be the Holley dual sync.
You could use the MSD distributor if you batch fire the injectors but that seems like a downgrade given the parts that you have.
You might want to touch base with Rich at FAST Man EFI and tell him what you want to do. He can give you a parts list of what you need to buy based on what your goals are.