A few minor things here and that can gain you some room with the spacing but may cause more problems for intercoolers and such so you have to plan for what you want.
I have drawings for the old plates but I am scrapping them and going with new ones to make everything fit better. I don't know exactly how cary ended up centering the axle but when I moved the bracket forward I did a couple of things to gain some room, by centering the axle about .5 to .75 inches back and by rotating the front bracket slightly to the front you gain some more and a slight notch on one side got it where it is but like I said I am going to make new brackets that will have an offset below the bumper bracket and bumper edge but also be wider to spread the load on the frame. Probably do them next month, I will take actual pics of the plates this time before they go on, I hope to be able to get rid of the bumper spacers completely but it doesn't bother me the way it is now it looks like the SD's do I think.
Oh yeah, on the shackles I used some factory ones at first but didn't like them and ended up going with shackles from sky, they will sell the pieces separately and the shackles are extremely stout and were only like $60.