I run a 2" shackle lift on my YJ (4" shackles) and have had no problems. I am, however, finally putting angle shims on the front end. Rotating the front of the front springs down made the steering VERY twitchy because it rotated the axle forward. Wasn't a "problem" for me until I had an accident this past summer on a motorcycle, and the "toy" jeep became daily transportation until I could ride again. It's amazing how the little things get bigger the more you use a vehicle, lol. Anyway, I'm putting some 6 degree shims in there to try and slow the steering a bit, damn thing tracks like I'm drunk. Word of warning, though - it's a b**ch to get the axle to line back up with the spring perches, even with the swaybar and shocks disconnected, and I need to get longer Ubolts because the stockers are too short to span the added height of the shims.
Now, for the main reason I did it: 31x10.5 tires on stock rims, no issues at all. I had to cut the weld and adjust the bumpstops on the steering knuckles so I didn't rub a sidewall at full lock, but no rubbing at all. I've been happy with the addition (aside from the wonky steering). I'd suspect if you're doing a 2" shackle / 1" lift, you'd be OK without having to shim the front end.