What's wrong with them, the length or the attachment system? I've seen two different attachment methods but I don't know which years or models were supposed to have which method.
Oh, you don't have a limited slip differential, do you?
That could be the issue. Positraction '59 Chevrolet trucks used the GMC Spicer 45 axle. Parking brake cable and rear drums are not available for the axle.
