Type injectors?

I’m not sure what injectors to go with my setup… I’ve got an aireasearch t3 turbo .48 hot 50 trim… i have a walbro 255lph, aem fpr, str fuel rail. But i’m not sure if i should go with dsm 450 injectors or 310 rc injectors. Is to big of injectors not good? What about an FMU setup? I’m not too sure about how i’d need an FMU setup, that’s only if i’m running on stock injectors right?