One of the major mags, 4WOR or 4wheeler did a OK job on a write of just such a set-up. They used a custom front spring pack that has a stock length from front spring eye to center pin and all the "extra" length was from center pin back. I run the same style spring from Alcan and works sweet! The one large downfall is that you get all most too much movement and with the tire in the stock location a 38.5 Bog will get into the lower fire wall, so some major hacking is required.
I looked for a pic of the front of my rig but had none.
Good luck, Jeff