Jeep Cherokee Forum - Rancho rear leaf springs

Hey guys, so I'm seeking for some wisdom. Currently rolling in a 97 and the rear leafs are about shot. flat as a board and inverted when loaded. I originally wanted to lift it, about 3.5 inches with full leaf packs but currently funds had to be diverted. I was on quadratec and saw the rancho 1.5" full leaf packs and was wondering how much would i have to lift the front to achieve a level stance if i ordered the rancho leaf packs? I've seen coil spring spacers between 3/4 to 1 3/4 as well as 2 inches. I'm guessing it would have to be one of the last two, if it even makes a difference. Any input would be appreciated, and sorry if this sounds like a very basic question. Also later on if i decided to lift the vehicle higher, would it be advised to use AAL or extended shackles in the rear? Thanks in advance.