Shortening 9 1/4 and mini tubs

Has anyone out there shortened a 9 1/4 for a Dart with mini tubs? Can the axles be resplined and C clipped or should they be junked for new ones? C clip eliminators? Just trying to get info for the future of the Dart. I have two of them with posi's and a plain 8 3/4. Strength of the two? Any insight would be appreciated. Oh! Intended usage is street with a four speed. No slicks. Engine? 360 probably. Have hopes of a 505 somewhere in the future.

Thanks,
Jack