It's a 2009 Jimmy Smith Motorsports chassis with:
98 350 Vortec engine, Turbo400 mated to a Dana 300 t-case. The transfer case has front and rear big shaft upgrades.
Front Dana 60 with 6.17 gears, detroit locker,all chromoly axle shafts and super joints.
Rear Dana 60 with 6.17 gears, welded...