Standard Housing Upgrades
Australian company Altra9 based in Queensland have designed a bolt in kit which fits into the factory housing. Suits -> 10 bolt small salisbury which is found in TD, TE, TF and TG models.
Gemini Control Arm Kit (single ladder bar)
McDonald Bros Racing in Melbourne, Australia supply a kit designed to replace the standard torque tube. It gives you the option to run any diff you wish such as a Commodore Borg Warner, Ford 9″ or Toyota Hilux etc. This type of setup is generally for off road/track use only that would require engineering to be street registered.
More info at McDonald Bro Racing’s website.
Holden Gemini Full Spool Centre (28 spline)
Ultra Performance Components in Boronia, Victoria, Australia make full spool centres to suit standard diff housing. They are 28 spline and are $395 AUD + delivery.
More info at http://www.upc-online.com.au