Still relatively new to the Monty's myself, but with a similarly built 3.0L V6 in my 89 I just rebuilt, I read that the valve lash adjusters (lifters) will sometimes do this if they have little or no oil on the miniscule ports they have. If you have sludge, etc under your covers making it difficult for oil to circulate around the adjusters and actually get inside, this could cause your mild ticking. Apparently it's supposed to go away after a short time and oil has had a chance to cycle through the lash adjusters. If the ticking doesn't go away for awhile, you may have permanently clogged oil passages or bad lash adjusters. Mine had started to go bad and this was found during reassmebly prompting me to locate new units. My old adjusters had been badly worn and scarred and required replacement.

I've heard on a good engine lash adjusters will do this too if it's sat for "awhile".

If the ticking doesn't go away, I'd consider a head job, check and replace lash adjusters in combination with new valve stem seals (a must for 3.0L's every 60, 80 or 100K miles or so).

While the heads are off, mights as well replace that timing belt (even if it LOOKS good) and get a new tensioner.

Piece of mind for another 60,000+ miles is what it'll get you.

MI-Mitsu