what a gorgeous car and sound - I visited the Lancia guru at the Clintonville WI airport and fell in love with the cars
Traditional fuel level sender has a wear component in the resistance wiper or a capacitive senders are subject to contamination.
The concept is as Neil stated If you have two independent reliable sources of information both of them digital (limited wiring/connection/corrosion faults - you have an output signal or not) - These senders are magnitudes better than anything a a GA pilot has experience with These are not new senders - but new sender technology - Look into it
Nice heads up
That is not an issue - the plug can be recessed into the body and a 90 degree connector attached - we have this config for an M-D Helicopter application - The concept remains the same and this unit is FAA approved for several aircraft and soon to be TSO'd for more