The scary thing is, although you can't really put a price on a car like this an insurance company would. Because of its age it wouldn't take much of a prang for them to write it off, so like you say, I'd be afraid to use it, but I'd love to own it!
But you can get an "Agreed Value" policy for unique cars such as this instead of a market value for total loss.
Pete it's nice to se you on here,are you missing the 430?
I'm assuming an agreed value policy would be way higher than a standard one though.