One of the GM dealers in my neck of the woods does charge a cool 1 K to replace a fuel pump on a late model pickup, they left the tank in the frame. I watched as they lifted the bed off, then replace the pump - and drop the box back on. Just how they do it I guess.
I do not have any real comparison for the KJ's though.
05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015