1965 289 Ticking

I have a 1965 289. Whenever it runs while it’s cold, there’s a small ticking sound coming from the engine. My first thought was one of the lifters needs lubrication.

When the car warms up after driving, the ticking goes away. Is this something normal for a classic car? Is it something to not really worry about? I spoke to a mechanic about it, and his advice was to just leave it alone.

Appreciate the assistance!