I ran 9 1/2#s on my stock 5.3 all day long and then threw a 50 shot on it and sprayed it probably twice a day. I have a lead foot haha. Just make sure you have good headgaskets

 

I used Eibach springs on the rear and it came with extensions for my autoride system so I didn't have to swap shocks or anything. Just swapped spings, changed the air ride sesnsor bars and put it back together. I just adjusted my stock torsion bars a few turns to lower the front to level it all out. Word of caution, my driveshaft destroyed my tranny cause the pinion angle was changed so much. I had to have 2" chopped off the driveshaft to keep the new tranny from being destroyed. I never heard of this before it happened to me. The ride is pretty stiff, I just moved onto a dirt road