Going with gas

YES, the VZ can be fitted with LPG, and Holden has a factory-approved duel-fuel kit that was developed by Impco. But it's available only on the VZ Executive sedan and wagon, so you may have to look to an after-market kit for another model. In that case, the engine won't have the internal changes, but Impco and Victorian Autogas Supplies have kits that are satisfactory on the Commodore.