I'm trying to decide whether to convert my ba falcon to LPG and was wondering if it is worth it like is it harder to work on and service yourself and stuff and what's it like with milage compared to petrol and how much does it cost to get it all set up ?, any info would be greatly appreciated

Yes its worth it,
yes you can still do your own servicing although you should leave the gas stuff to licensed fitters.
You will use more LPG per KM then petrol. but $$$ per km is cheaper with LPG.

Will cost between $3000 and $6000 depending on who fits it what they fit.
You may be eligible for government rebates.

Ok awsome, iv heard a few things like that if u just use LPG that it will ruin your engine coz it runs through the engine dry?, also that after a while of it stuffing your engine that it will start to run using the same as petrol and costs the same ?

Ford I6 engines are built for LPG. Most taxis are converted from petrol-only to dual fuel and last over a million kays. If it's a B-series, get a decent injected system like Emer (ALPGW), Eurogas (ALPGW) or any of the liquid injection setups.

What about the AUs coz I'm thinking about Tradeing in my ba for an au LPG ute as it will be very handy for work ?