I don't have any experience with this particular design but can see no reason why she wouldn't take happily to junk rig. As for the issue of directional stabillity: most of the yachts happily sailing around the world these days have a fin and skeg/spade profile. Indeed, with reliable self-steering gears, it's debatable as to whether directional stability is an asset: it will make the gear work a lot harder.
As to the issue of capsize: it is infinitely more discussed than experienced. If the design was considered fit to participate in OSTAR, it should be fit to sail around the world. The majority of modern boats are adequately designed. A bigger issue is how well they are built - see Peter Scandling's post about his bulkhead coming adrift. If you like the boat and she seems sound, I'm sure you would get a great deal of pleasure and satisfaction from converting her to junk rig and then taking her off to new places.