Based on this FAST rule, can I run a Dana 60 in my Duster if it's built to look like a stock OEM rear end?
Quote: 12.00 REAR AXLES 12.01 The rear axle housing must be of the same manufacturer as the car. OEM appearing aftermarket housings are OK. Internal modifications are OK. Any gear ratio allowed. Aftermarket axles are OK. Upgrade to posi-unit or spool is OK.
