I have been noticing that the rear of my K5 sits a little low since the addition of softer rear springs....and I was wondering if a longer set of rear shackles would be a "valid" way to gain a little bit of height back there. I would normally put on a set of zero-rates and be done with it, but I have a spare set of rear shackles already and I can extend one of the mounting holes about 2" to gain 1" of lift. THE QUESTION: What am I going to affect, besides the pinion angle by adding a longer rear shackle? I know the pinion will be rotating UP, but I'm not sure what other adverse effects I might be creating with this "free" mod on my truck. BTW -> The rear setup is a 4" ORD Shackle Flip and a stock set of springs off an '89 K5.