Check into a club for Mustangs. I had a friend who had a '90 Corvette. He joined the Corvette Owners of America club or something like that. They had a huge group insurance plan, he only paid $500 a year for full coverage on the car. He was a well ticketed driver too! Funny he always got pulled over in his Mazda 323, never the vette. The only stipulation was he was to only drive the vette 10 days or less a month, couldn't be a daily driver. They never really monitored that, but that was the deal.