Ideas on what's causing my click/tick/rattle noise?

A thought just occurred to me, but you'll have to clarify a couple things for me first.
You've got an '82 hydraulic head with early mechanical valve gear- did the stock '82 head use exhaust valve rotators? (IDK, I'm not well versed in slants...) If so, is there any chance the late springs may have been installed with the early valve gear? Springs used with rotators were a hair shorter than the standard ones- this might be enough to cause a tick in the valvetrain when used with normal retainers...?
Or maybe I'm way out in left field. :realcrazy: