zero rate in the back, it'll set dead level
that was going to be my exact recommendation 

Good looking K5, I like that color combo...
I would suggest taking the top off. I bet that will level it out
I thought about the zero rate but I'm going to put on ORD shackles and that gives me a 1/4 lift. Also I read on here that a D60 gives 3/4 inch of lift. So I either run a 2.5 inch spring for 3.5 in the front and 4 out back , Or 5 in front and 6 out back. Unless I move I'll never go bigger because I park in the garage.
If you go longer on rear shackles , it will lower the rear. ( I don't see a shackle flip on it ) Only WITH a shackle flip will a longer shackle lift it.



you wont even realy tell 1/4" lift but you will get hd shackles and spring eye clearence to frame.
also zero rate = the win.
and drop hitch more.