Engine "Tick"
I would be looking at that 318 timing chain......:banghead: 318s are notorious for timing chain slack....and,
I have seen a Oil Slinger installed backwards,.... fatigue the chain and cause a bottom-end noise that never fully goes away...chain slap on the timing case....very noticeable under 1500rpm.
The Nylon Camshaft Gear -
sickening that such a simple part, cleared more 318 mopars off the roads than any other mechanical failure.
this is MY Opinion/Advice.
Good Luck.