I'm not sure you're serious by the tone of your post (no insult intended, if you are), but if what you mean by "aggressive stance", that 70s raked look, forget it! Your car might look mean, but will drive like crap!
As for me (and maybe hamsterhats, don't know), I was thinking of just a few inches, my rear fender trim comes just below the raised white letters, I like the look of front and rear about an inch above letters with a little tire still behind the fender. Not really "stinkbuggy" but just so it doesn't look like my rear is dragging.
Do you think only that much would mess up handling for the Darts? Thanks.