Potentially nistune…id only trust an SAFC for simple things like a exhaust and intake. Some form of remote (rom tune), and then with the base tune on the car, use the SAFC to tweak it a bit.
I assume 550cc injectors your speaking of the RX7 ones some guys use.
I know a guy that would prolly be willing to let go of his set-up…and would have most of the parts you’d need. PM me if you’d like and ill put you in touch with him, hes done what you want to do and could really help you out I think.