oh! one side note on the shackle flip...you turn it around 180* so the shackle does not bind on the leaf when its fliped...you will see what I am talking about when you get there..

when I removed the stock rear hanger,i used the top front hole and drilled the other 3 holes and used 1/2 bolts/nuts on the frame.

you have to have the shackle bolted up to the hanger when you bolt it on as the spring bolt is captured by the frame and bracket.

hardest thing is removeing the rivets from the hangers