If you plan to keep your ~Z~,,,do not put a used axle on it.
I know you live on the Left coast-but we have some very good tech's & parts supplier's on the east coast.
call Z1Motorsports & speak to Russ,Jon or Joel...They have the knowledge to help guide you......i'm not sure what will fit-but sure as heck wouldn't go the used route.
Look up their website..