W/o moving the front axle forward, you will need about 4" of lift to fit 33s:
- http://www.4crawler.com/4x4/4R_suspension.shtml

Otherwise it is farily tight at the rear of the front wheel well:

[Linked Image]

Here is basically the same setup with the axle 2" forward (with a rear->front spring swap):

[Linked Image]