As a general rule, I advise chopping D&D treasure amounts back by about 90% when converting them to Shadowdark. (Alternately, just change what constitutes a common, uncommon, rare and epic treasure haul for Shadowdark.)
Running Shadowdark in Ptolus would be easy in a Dungeon-facing campaign where you can send your delvers down into the Dungeon, have them bring back treasure to sell in Delvers Square and then blow it all carousing at the Ghostly Minstrel (or the Pointy Hat, if your characters are big nerds).
