Injector and maf help please

Im looking for a set of 30lb injecotrs but found stock LS1's have 28's, i can buy them dirt cheap but didnt know what i would do about a maf. Would i just get a maf for 30's and be ok what would have to be done or would it just not work? Do you have to have 19,24,30 etc. sized injectors on mustangs?
Im putting a big dry kit to my car and want to make sure i dont lean out.

If i get a new maf ill only get pro-m. I saw they have a small box that piggybacks the maf and lets you adjust but its pretty vague as to what sizes or if you have to be on a dyno and play with a/f ratio to set it right. If it works with the stock maf then i could get it but buying a new maf and the adjuster is too much money.