for a slight NA build like that, no, you won't need new injectors to run the setup, but you would need some sort of fuel-tuning such as an SAFC
As for the MAF, you can't convert to MAP or use a MAF from a GM (or at least nobody's done it- why don't you try for us?

: )
BUT you do have the option of using a Supra TT MAF that a lot of the boosted solara guys have used with pretty good results.
The only thing that I would suggest is that you finalize what you want firwst before starting the rebuild or else there may be wasted effort and the need to do things twice - i.e. port matching your acis, intake plenum = useless if you plan to go boost