Injector size with no FMU on stock engine

I tried searching but I can't find a concrete answer. I am looking into adding a Vortech with 8-10lbs of boost on a stock 1990 Mustang. Only mod is the air silencer is removed. (Haven't even bumped the timing) From reading other posts I would rather not deal with the FMU. I plan on adding a 255 fuel pump with the supercharger.

What size injector do I go with when I delete the FMU. Will deleting the FMU and running bigger injectors cause any idle problems with a dyno tune?

Thanks.....

Thanks for the input.....