what i did with mine is tb crank infornt, got me 2inches. but play of the upper arm was significantly lessened. did the bj flip with spacers, initially at 15mm, but i ate through 2 ball joints in a year. so, lessened it to 10mm.

the rear at first i tried original leafs but with extended shackles wchich looks almost exactly like the one on the pic, but the ride quality was compromised for the rear, so i decided to to add an original leaf the longest one, and just hack off the eyelets so that it will fit,plus i had all of the springs re-arched-got 2inches from both. it gave a better ride, but not significant, so in all i shouldve just stuck to the shackle extenders and not spend the extra cash.