110 V8 LPG Tank Fitting

I am looking at fitting an LPG system to my 110 V8. I have seen the tank fitted just behind the bulkhead(it is a 3 door) and have heard of people underslinging tanks to the chasis but never seen this in the flesh.

Does anyone have experience of either of these alternatives and views on the adventage of saved internal space v reduced ground clearance (if any)

Also interested in capacities people have achieved with various alternatives

Regards

Andy