It should be really sharp and would be normal for 8x10", but you won't get much movement for subjects at a distance. Artars have a relatively narrow angle of coverage, because they were designed to be used around 1:1.
It would be a good longer lens for 5x7", though. Artars are best at the long end of whatever format you're using them with, since the larger focal lengths will offer plenty of extra coverage, and because they are relatively compact. I use a 19" Apo Artar on 8x10", for instance, but for a 12" lens I use a Dagor.