Hi FB Crazy, I would suggest going through
Heacock: http://www.heacockclassic.com/passion/antiques-classics?gclid=CKe8t66hmbACFQOEhwod1jBw2A
Grundy: http://www.grundy.com/
Hagerty: http://www.hagerty.com/

In that order. I have 3 cars insured through Heacock all above $10K agreed value and it's only just over $300 a year. Haven't had any type of claim yet, but I'm happy with them and they were easy to work with.

The majority will require it be in a secure garage etc...

Where here in WA are you? I'm in Federal Way. Were having a cruise the the http://www.lemaymarymount.org/ on Sunday where we have 5 of the Western Washington Firebirds on display in the car club corner. (My 67 drop top is representing the first gens)

Let me know if you need any more info and I'll try to help!

Thanks - Brett!