More to go wrong..
Space for the tank....a huge issue
tank protection
Thats before finding service stations.....
Oh and running LPG is gheer than Julian Clary....
space for a tank can be an issue, unless you go for the split underfloor jobbies which run a cut down main fuel tank.
tank protection? when you consider a normal plastic tank is a few mm and a petrol tank even less, I think a gas tank made with a 5mm plate steel a lot safer option.
its better for the engine as it doesn't create carbon buildups and the oil lasts longer in the sump ( providing you got no leaks), service stations are everywhere unless you are wandering round the glens and lochs of scotland, never had a problem finding gas and if you have a tomtom you can have a poi for lpg and you will be surprised where you can get hold of it.
just make sure you get a multi point system and not the older single point.
not sure about the julian bit tho so that could be right....but I have never had any problem when i ran an lpg jeep, except for thumb ache at the pump