The BO29 is the cuda,the LO23 is the dart,both are special order super stock package cars.In just abot all cases,they where set with dana,s,except a few people that have automatic cars orderda 8 3/4 to be able to swap gear sets fast.Remember that the banjo diff with aftermarket axles and spool will with stand alot of power with a re-enforced housing,mrmopartech
