Alcan will build whatever you want, but they understand the issue w/ chevys and shackle angle when lifted and, as policy, add length to the springs to accomidate. so in other words if you just called and ordered some standard 4" lift springs for the front they would automaticly make them longer to fix the shackle angle. when they build mine i am having them move the pin 2.5" forward for more wheel base. if you decide to go this route be sure your done building your truck b/c they want to know the specific weight of the front and back incase you have added a winch, bumpers, BBC, whatever. this is a good time to set your wheel base where ever you want. as far as the shackle flip goes i dont understand why you have a bad angle there you may have them installed backwards or fliped side to side, i have not heard of any one having this problem w/ Kurt's stuff. either way you could play w/ shackle length in back, shorten them up an inch and that will give you roughly 10-15*. IMO i would order some 56" long rears from Alcan w/ a pin offset of your choise and push the shackle hanger back some, thats what i'll be doing. any way give Alcan a call they have great customer service and will be glad to answer any Q's you have. good luck - justin