OK, I\'ve been looking at shackle flips, Who\'s do you run ? I've been looking at these for awhile now and was wondering whos' you were using on your personal vehicle. I have been looking at the ORD's and Sky-Manufacturing's and the one's that Backyardbuilt makes. I'm looking for pro's and con's if you have them. Also, what year GM can I use the lowering shackles to gain somemore lift when I install the Shackle Flip. Thanks for your input!