My steering shaft is on the right, therefore yours must be on the wrong, lol. With what you're undertaking, a bit of worry and double checking everything is well worth doing (I'd call that smart).
I severely underestimated my time. I started at around 12.30pm this arvo and it's now 1.00am. I have had 2 breaks - one to go and get some 1/4" steel (I only had enough to do one), and one for dinner, so about 90 mins max. I am slow! My only excuse is I also fitted a set of mud flaps, but had to trim them up a bit so they didn't look totally crap; end result is they look crap, but not toally.
Will fire some pics up of the 1/4" spacer etc at some stage.
RB - just a thought; with your truck having 3" spring lift and 3" body lift, would adding spacers to the back of yours give you grief in the axle through chassis area? Mine's pretty close with only the small lift I have - yours must nearly touch.