Since I'm an M6 car, I am strongly leaning toward dropping in 3.91's myself, but that doesn't necessarily need to be done beforehand.
12 LS M6, IPF S/C, ASA GT-5 wheels, VMax PTB
1995 Mitsubishi Montero SR
1987 Dodge Raider Turbo Project
1986 Mitsubishi Montero 2.4l FI Transplant