My combo is in my sig...you're talking about putting on MUCH better flowing induction, so my bet is, when properly tuned, you'll be able to pull in the 400-420rwhp range...but 30+hp is only a pulley change away
You might wanna shop around for some of that other stuff...I saw you have an MSD 6AL there for $200...they're a little more than that...your factory computer already has a 6250 rev limit, unless you're looking to make it slightly lower, it's almost a waste of money to drop the extra $60 for the AL box. But, you could also go with a Mallory Hyfire VI-AL-same as the MSD, but cheaper, higher spark energy, no need for the rpm pills, and just as easy to hook up...for less than $200. The BTM box also runs $200 unless you find one used (I see them go on eBay all the time for $75). Honestly, unless you've got the hook up, you're gonna have a hard time finding an 80mm MAF and 42lb injectors for $300...
It would definitely be a killer combo, but IMO, you really should start checking the prices a little more accurately. Also, don't forget about the nitnoid stuff that tends to murder your wallet. The last minute gaskets that you may've messed up on install, the adjustable FPR, all the gasket sealants, oil, coolant, etc. For every engine build, or major mod I've participated in for the last 3 years, I've noticed that there's been at least $200 worth of nickel and dime crap that we collectively overlooked or at bare minimum neglected to account for...the devils' in the details, bro-trust me.
At any rate, don't let my rantings dissuade you in any way-press on with making your 'stang into a fire breathing beast-just keep in mind that there's at least a couple of c-notes waiting to disappear out of your wallet when you're not looking, not to mention all the other parts aft of your newly acquired power that are now prone to breakage (unless you were smarter than a great portion of us who decided to shell out their t-loc, tranny, axle bushings, torq boxes, etc.)
Have fun with your build bro!