Ok, so today I decided to replace the 3 valve cover studs/caps I snapped off and while I had the valve cover off I noticed something disturbing. 10 of the 16 Valve adjustment nuts are like hand loose. It sounded like I needed a valve adjustment but DAMN. I'm scared to drive my car now. So I picked up some feeler gauges and basically looked around for a shop manual but every place was sold out. I still don't have a helms and want to make sure i'm doing this right. On a LS, where do put the feeler gauge between? Is it between the top retainer and the valve adjustment screw? Or is it somewhere between the cam lobe and something else? Also, which feeler gauges should I use or whatever. I read somewhere for an LS the intake should between 0.003"-0.005" and exhaust 0.006"-0.008". I'm going to try and do this in the morning.