This is my first jeep, purchased in September with 101k miles.  It's completely stock except for the tires and the CB.  It has stock 3.54 gearing with 31" TSLs.  I have 1.5" wheel spacers to bring the narrow track axles to wide track stance.  D30 up front and AMC 20 in back w/1 piece shafts.  Iron Duke 4 cyl engine is slow on the street, but tough on the trails.  I'm loving this jeep!  Future mods include: rock rails this weekend, a locker up front in the next 2 months, and by the end of next year a lift and 33's.