Can a 12 bolt non posi rear end be converted to a posi rear end?

Yes, a 12-bolt non-posi rear end can be converted to a posi rear end. This typically involves replacing the existing differential with a posi unit, which can be sourced from aftermarket suppliers or salvage yards. Additionally, the installation may require new gears, bearings, and possibly other components to ensure proper fit and function. It's advisable to consult a professional mechanic for the conversion to ensure it is done correctly.