Hi,
The Public Records Office of Victoria shows three possible passengers from Vic to NZ around that timeframe:
JORDAN J 26 ALHAMBRA MAR 1878 NEW ZEALAND MAR 1878 001
JORDAN JAMES 29 OTAGO MAR 1874 NEW ZEALAND MAR 1874 002
JORDAN JAS 34 RINGAROOMA DEC 1876 NEW ZEALAND DEC 1876 001
The only one of these gentlemen to travel with his wife seems to have been James Jordan on the Otago - you would need to check dates/ages to see if the details fit.
(See more at:
http://prov.vic.gov.au/search_results?searchid=42&format...)
Cheers,
Brooke Marshall
www.dawsonvickery.co.nz