I had my factory injectors cleaned and flowed before fitting and was told that the injectors flowed more than a RB30 injector
N/A tihey only ever get to 50% duty cycle.
I doubt you will have to change either inj. or reg.
if you find the need, look at 280zx inj.
most of the newer injectors don't have a hose tail
big range if you go new inj. but more money too!
try what you have, save what you dont need to spend.