Well, I found out what size pin I needed, but now I am thinking I will need new u-bolts. I have the bolts that came w/ the pro-comp kit, will they be long enough to use w/ the 2" AAL and 5.5" block? The kit came w/ only a 4" block. Also, the stock block is removed and replaced right? or is that left in? I know never to stack blocks, but I think I read somewhere that the stock one is left in. Thanks