Okay, I saw something really wrong in here. Someone (not mentioning names) said that they were going to swap in a 4.6 stang maf and use 4.6 stang injectors. That is wrong. Ford control's injector sizing inside the computer. Us Tauri peeps have tried this going from our stock 14# up to the flex fuel 24# by swapping maf/injectors with NO luck. Custom burned chip is needed for that swap. I'm sure you could get away with 19# since its only a little bit larger then stock but its not optimum. I did a maf mod (not recommended by RARA so I won't go into detail about it) and increased my fuel pressure to compensate for the extra air.