Skip the ReadyLift, skip the gigantic blocks and most importantly, do not ever call 4 Wheel Parts for anything Raptor related. A 2.5” front lift and a 4” block under your leafs will make your truck site 1 3/4” higher in the back, which in my book is nowhere near “level”. 4WP is a one stop lift shop for everything non-Raptor, so they do not have a clue about what is right for our trucks. If all you sell is hammers, then everything looks like a nail...
As others have said, do icons or Deaver +3s in the back, which removes the unwanted factory blocks. Do Geiser progressive springs or one of the reputable Raptor Perch collars and you will be very close to level with a much better setup for your truck.