You can just get a maf calibrated for 24 lbs injectors. You can * also* get a tune *instead* of changing the maf. But that would be the more expensive route. I would look into the abaco maf unit. You can recalibrate it your self via laptop. So you would never need to buy another one for future upgrades. You can find a link for that in the useful sticky thread.
What mods do you have? Because I would stick with stock 19lb injectors unless you have quite a bit of bolt ons. The 19lb injectors will support close to 280(?) Hp.