All your questions have been answer, don't waste money on MAF, do the headswap. Your stock MAF should support your vehicle up to around 300hp, depending on you application and even higher. How long have you been at hood?
Under construction(NOVI 1000,3.0 ASP pulley, 42lb injectors,70mm Throttle Body,87mm PRO-M, Walbro 255lph pump,FPR,Autometer Shift Light,FMS Shorties,Mac Prochamber H-pipe, Pacesetter Catback). and much more......