Motor Set Up In A 02 Gt???

Hey guys brand new on here. Not even sure this is the correct place to post haha. Anyways I just bought a 02' MUSTANG GT. IT is going to be a roller since I am going to yank the motor that's in it due to the fact that it has 170k miles and a spun bearing.

My question is I plan on buying a low mileage 2v motor completely stock and I want to know what kinda mods I should get to get this car pushing around 450 to the wheels? I know it would seem obvious and easier to just buy a termi swap or a 4valve in general but financially that doesn't make since for me. Opinions appreciated!!

Additional notes: on the car currently
Mods:
-Hotckis lowering Suspension kit
-All Braided Steel Fuel Lines
-Fuel Lines Connected With AN Fittings
-Aftermarket Fuel Rails
-Aeromotive Fuel Pressure Regulator
-Aeromotive a1000 Fuel Pump
-Fuel Cell in Tank
-Full Cold Air Intake
-Performance Professional Intake, and Throttle Body
-Ford Racing 3.55 Gear (Odometer was corrected)
-Transmission Was Rebuilt with Tremec Upgrade Kit, The upgrade kit comes with carbon synchronizers and Ford Racing Black Nitrated Gears, and the transmission is running with Pennzoil Synchromesh
-New Center-Force Racing Clutch Set, With Adjustable Clutch Cable
-Long Tube Headers with 2.5" piping all the way back to Magnaflow Mufflers
-Has Welded in Subframe Ties
-Has Tubular K Member
-MGW Short Throw Shifter, That also has Brushed Aluminum 5 Speed Shift Knob
-Has working Innovate Wide Band
-It was Tuned with Sniper Tuning Software, Tuned on 89 Octane
-Battery is Relocated to the Trunk

Thanks for tha response! I actually found a replacement motor from a 03 GT with 43k miles for 2 grand. Good deal? Unless your teksid set up would be in that ball park as far as price goes.