I could really use some advice, I have a 2000 GMC Sierra 4.8l rwd. I'm buying a used truck very soon, either a 2005 Silverado 1500hd LS at 135k miles for $10k or a 2005 Sierra 1500hd SLE at 156k miles for $8.5k. They are both stock and same condition exterior. I am looking to put a cam, tune, stage 2 trans, 6in lift and some other goodies in it. I am completely stuck on which one to get, any experiences or advice could really help me.