Engine builders/Gurus, I need your help.

I had the same thing going on for years. The car was never driven hard and didn't go for long distances and really didn't get all that many miles in a year. I did every thing I could to stop that tick. I changed out the rockers in the noisy area, cleaned and checked the pushrods, brand new cam and lifters, oil changes, oil additives, blah, blah, blah, it went on forever. The piston had developed a crack from the top ring groove up to the top of the piston and the piston would just tap the head enough to make a noise and the crack was just too small to see when I had the head off. Long story short, the piece finally worked free one day and block and one piston trashed.