He has an LJ, so it will be the 42rle. Stupid high overdrive and you will want 4.88 with 33's.
I have the same tranny and 4.88's. That is as low as I can go with the D30 up front.
Stock gears sucked, 4.88's was great with 33's. Now with 35's, I wish I had 5.13's.