'88 sub adjustable rear drop shackles?

[krawler00]

Hey guys, I have an '88 suburban and recently dropped the front with 2.5" drop spindles and now am looking to lower the rear. I am not wanting to give up the rake I have. The rear is currently stock but am looking for a 1.5" drop or possibly a little less, maybe a 1". Reason why I want to keep the rake is for one, I like it, and also the front fenders are cut higher than the rear so when level, the front looks higher due to this. So my question is do they make a reversal shackle that is adjustable to dial in what height you want? I saw one the other day that had holes drilled on the shackle sides and looked to be adjustable. Just pick a hole and insert? So just looking for ideas. I just like the raked look.

Thanks!