If you just want to make around 225hp on a stock bottom end, run low boost with a SFMU setup. You can prob get away with 270cc injectors, in which case you can just run the SFMU and wont need any other management tools. An idle fuel pressure of around 45-50psi should suffice.

You can go as high as 330cc on an SFMU setup, but you will want to lean out idle a bit which can be achieved using an SAFC. If you go any bigger with the injectors, your idle fuel pressure will have be too low and your spray patterns will be garbage. That is when a real management unit like MSnS can come in handy.

Good luck!