Step side running board bracket

[BigRed63]

On my 63 C10 step side I recently purchased, the seller put in 2x6 wood bed. In doing this he raised the bed up 1 inch to accommodate for the thicker pieces of wood. Now there is a 1 inch gap between the running board and the bracket. My question is what would be the best way to correct this? Should I shorten the bracket, put in a spacer, not really sure how to move forward with this and any input would be greatly appreciated.