Forget the so-called kits, purchase the components you need individually so you know exactly what you're getting. That kit you referenced for example suggested reusing the timing chain. No, new timing chain and tensioner. New VVT actuator and solenoid.... OEM genuine GM ACDelco. Online you can purchase an L92 camshaft from Chevrolet performance. Melling 10296 oil pump with the +10 psi spring installed. Cloyes timing chain and gear set. Michigan Motorsports will sell you the genuine Delphi LS7 lifters with the gold retaining clips, as well as genuine GM lifter trays. Do not use any other brand of lifter trays. If you don't want to deal with the angle torque on the cylinder heads, splurge the $160 or so and by the ARP reusable bolts. Just torque them down like the good old days in three stages. Go online and buy the steel plugs that you tap in with a hammer into the oil towers below the valley cover. Even though your new valley cover will come with o-rings to seal, it's best to make sure there's no chance of losing pressure there. Like I said, be careful about buying a prepackaged kit. There's one company... I want to avoid naming so we'll just call it a company that's named after the state of Texas..... Tried to sell me a kit and when I looked up the part number of the camshaft it was for a 6.0 and not the 6.2. Didn't have the correct lift or duration. Called and told them that's not acceptable..... They said it will work just fine..... And I said yes, with about 50 less horsepower.... And they hung up.
You also need a new crankshaft harmonic balancer bolt. It's also a torque to yield and not reusable. I would replace the camshaft and crankshaft position sensors with genuine GM, simply due to the age on yours. The blue felpro mls head gaskets are good, as well as their front timing set.
The list while you're in there can get extensive, depending how much you want to spend. Installing a trunion kit is good preventative maintenance for the future. Great time to throw that new water pump on. You will need the flywheel locking tool that bolts on in place of the starter. Is the starter original? Good time for a brand new ACDelco, new not remanufactured. All new hoses, serpentine belt, tensioner and pulley.... It all just depends how much you want to spend in the quest for a reliable engine.
