i have king 2.5's on all 4 corners and 315 bfg's on my 07 FX4. i have the front set just where i want and the rear is a touch too high. I would like to replace my factory 1 5/8" rear blocks with either 1 1/4" rear blocks off the 09+ trucks or go down to a 1" top gun customz block. Are the blocks off a 09+ truck going to work on my 07? ...and who has a set to send my way!