Its a much sought- after driveshaft that bolts to a pre-1955 Chevrolet car transmission. The only thing required is a cross-member to hold the carrier bearing.. FROM THE CARRIER BEARING BACK, it bolts to open driveshaft . Then you can run : like a S-10 rearend or a Camaro/Nova, Ford rear end . AND drive in the left lane .... !!! $160.00 buyer pays shipping .. verde742