I recently bought a 2002 2wd Yukon that is slammed. The back springs must have been torched because they are completely flattened and the torsion screws for the front are completely backed out. I have 20 inch stock rims with 32" tires. My question is should i go with new stock springs or the heavy duty Z71 springs for a little more height? If i do go with the Z71 springs will stock ac delco shocks work? Anybody have pics of their Yukon/Hoe with the Z71 springs? What is the fender height (without any spacers) ? Thanks in advance.