Forced induction generally comes in "kit form": you might get a package that includes the head unit, injectors and a tune. For a 96 with its return-system, I'd consider an in-tank pump upgrade to a 255lph unit to replace the thirteen year old OE unit there now. It's probably overkill for that power level but it's headroom and peace of mind.
I wouldn't attempt to run a forced-induction motor to 320rwHP with the stock 19# injectors. For that sort of power and, again, for a safety margin, I'd look at 24# minimum or 30# units. The MAF should be fine. You'll definitely need to get a tune for the PCM to tie it all together.
A set of plugs one range cooler would also be beneficial.