[Gordon Levy]

John, if you remember. Your car when you brought it by wasn't making any noise except for standard roller rocker noises. I said I would adjust it but I thought is was a waste if your money. If you have lifter noises that are coming and going, a vlave adjustment isn't going to help. This means most likely there is a lazy lifter in the engine.
If you want to adjust them yourself, it isn't that hard but I do recommend you do it when the engine is cold.
1) Remove valve covers and rotate engine to TDC #1
2) Loosen both rockers on #1, rotating the push rod with your figures, hand tighten the poly lock until you feel the free play go away. Tighten 1/4-1/2 turn after that. Tighten the lock and do the other rocker on that cylinder.
3) rotate the engine 90 degrees and go to the next cylinder in the firing order and repeat. Once you have finished running through the firing order, reinstall the valve covers and fire it up.
Firing order for a hydraulic roller small block is, 1-3-7-2-6-5-4-8