Eagles77 is correct. You do not need a lift to run 32's or 33's.
Rubicons come stock with 32's (actually about 31-ish").
I'd recommend going with the minimal amount of lift necessary to fit what size tires you want. Reduces center-of-gravity, angles on driveshafts, better ride overall, ohhh...and co$t!
For 35's, you will need about a 2.5" lift.
For 37's, a 2.5" lift and flat fenders. <---What I did.
2008 2-dr Rubicon, auto,
RK 2.5" Max Travel lift, Fox 2.0 shocks, 37" Nittos, 5.38's, River Raider skids, Warn VR8000-S.
RIPP Gen 2 Stg 2 Supercharger.
Re-inventing the circle and straight line.