Fab news James, glad you get to keep the Corvette.
As for insurance people, they are a laugh. Added my wife (6 years younger than me) to my 1968 Corvette policy and the insurers didn't bat an eyelid. Add my wife to my daily diesel Ford Focus insurance policy (different insurer) and its all "Woah mate, that's gonna cost tons loads more because of her age". I politely (and correctly) stated that "I have added my wife to my 300 bhp (factory rating) Corvette and that didn't change the policy cost for that insurer, but you're telling me your insurance company wants a ton load more money for my wife to be added onto a 140bhp diesel Focus that is worth bugger all?" (probably £1.5k tops). They soon saw my point and I think they added her for a token amount like a £5 or summat.