Volks!

Good news is that Blackbeard just came home from the collision erasers and
he looks UNBELIEVABLY GREAT!!!
Shop is about 3 freeway miles from my office.
Bad news is that when I parked, I noticed white smoke in the back (outside
of the van).

Got out and looked, and it was oil burning back from the exhaust-ish area.

Just had the valve gasket jiggy-mabobs (that IS the technical term, right?)
replaced probably 15,000 ago but have been noticing some spotting back there
while parked overnight.
Now....
He has pretty much been sitting for a week straight, so if there was a minor
leak it would have obviously accumulated and explain the smoke.
I also heard what seemed to be clicky-clacking lifters . . .

My question:
How concerned should I be at this point???
As you can tell, pretty much mechanically retarded . . .
Anything else I should have looked at?

Thanks in advance!

Drew, Las Vegas
'90 GL "Blackbeard"