I know of one older Mopar sponsored SB 4 speed Duster that was very fast(high nines at 149 MPH ) that had nine inch spindles, he did a lot of wheeleis and never broke a spindle BTW, stay away from any auto parts named Aerospace, Aeromotive yes, Aerospace NO

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)