Hey guys, I am considering reworking the top end on my 5.3 I have a 2002 Silverado with the 5.3 with 4 speed Automatic. It is original and has about 180,000 miles on it. The problem is the tapping valves, sometimes it can be bad. I'm thinking new cam, lifters, push rods, have the heads done? The thing is, I have no idea what kind of lifters and cam I should get. I would like to get a little better cam if I can keep it running smooth. I don't want it to lope. I am looking for quality and longevity first then maybe a little boost with the cam. I am not looking for the cheapest parts, I know how to find those, I want to know the best. Any and all suggestions are appreciated. I will update as I get the parts and do the job. Thanks.