Making the Crown Victoria the car it should have been

I want to own a late 90s Ford Crown Victoria.  I planning to throw out the stock 220hp 4.6 liter V8 and swap in it’s larger brother, the 300hp 5.4 liter V8.  It should have been an option from the factory anyway.  Ford always use to offer the 351w when the 302 was the base engine, but for some reason they don’t do that with the 4.6/5.4 series.  Then I’m up in the air as to whether the car would get a Tremec T-5 6speed manual tranny or keep the automatic transmission and beef it up.  Regardless, the rear end would be seeing a set of 3.73 gears and a limited slip carrier.  Drop the car 1″ in the front, raise it 1″ in the rear, keep the stock tire size on front and run some 245 wide rubber in the rear and I’d be a happy boy.  Once I got bored of the 5.4, I could always build it up.  It’s pretty easy to get 400+hp naturally aspirated or 500+ with a blower.