John---
I don't know exactly what your click sounds like, but-----I have been dealing with these FE engines since 1958, of many confiqurations-----If you wany to get rid of the click---you got to have more
oil to the rocker assys--they used to run a line from the
oil pressure fitting up under the valve cover to supply extra
oil to the rockers because of clicking----the old oils would sludge up in the passages and not oil the top end so it was easier to bypass oil up there than diassemble engine for cleanout----I also asked if you had the drainback trays???