When I was looking for insurance on my (then-partially completed) Dart, one company asked for pics, which I sent as usual.
The rep actually asked me to explain the purpose of the blue tank and the aluminum box in the trunk



(I explained. Then they wouldn't cover me with nitrous. I replied politely that perhaps that person shouldn't be vetting applications for modified cars if they don't recognize a nitrous bottle and a fuel cell!)

Heacock Insurance (AMIG underwriters) had no problem with any of it. Only claims so far have been towing bills during shakedown runs, but they paid immediately.