SVT MAF isn't going to help. Ford MAFs are not "calibrated" for injector sizes like an aftermarket MAF is. The MAF voltage vs. injector pulsewidth info is in the PCM, and switching to another Ford MAF won't fix your problem. What you need is an aftermarket MAF calibrated for a 17# PCM running with 19# injectors (if you want to use a MAF to fix the problem).
Read Me! This will describe the issues in play here.
Hope y'all don't mind my trolling, but I didn't want to see this guy waste his money on something that he doesn't need.