What are you looking to do? Drag race setup, or handling?
You can do an 03/04 IRS setup, or stick with your current solid axle and upgrade it internally.(better diff, 31 spline axles. You can install better
control arms, coil overs,
panhard bar and even convert to a 3-link setup with a torque arm.
Sky's the limit..but a '12 axle will never get off the ground