Mitsubishi Challenger 2004: Gas conversion?

There are three main types of LPG systems: the mixer/venturi system that was very successfully used for many years and which is like a carburetor on a regular petrol engine; the vapour-injection system that operates like the fuel-injection system that's fitted to your car; and the latest liquid-injection system that injects the LPG into the inlet manifold in liquid form. It's claimed that the liquid-injection system is the most efficient and delivers the best outcome, but vapour-injection is claimed by some to be almost as efficient and well proven. Either liquid or vapour-injection from a recognized brand, like Eurogas or IMPCO, is your best bet.