Questions on putting a 2wd body on a 4x4 chassis

[Jman87]

so i bought a 67 c10 and a 71 k10. the 67 has an excellent body with no rust while the 71 has a beat up body. so im swapping bodies. I have heard that there is a larger hump in a 4x4 cab....so if i'm putting a 2wd cab on a a 4x4 chassis will i need to get a body lift?

if i get a 2" body lift...then will the front and rear bumper still be 2" lower?
if so how do i fix this or do i even need to fix this?

are there any other problems that i'm going to run into that i need a headsup on?