If you're going to go with the 550's then yes you will need some sort of fuel tuning device such as a SAFC or you can use a GM MAF setup too and control it with the MAF-T.

lol It will run VERY shitty if you don't have anything to adjust those trims. I started my car up once with the evo injectors in there and it ran like straight ass lol.

Also you'll need to get a AFPR too, and might as well re-wire it while you're putting the pump in.