Race car insurance
megajoltman's link is one.
I did a quick search using " race car insurance " and got a bunch of companies who provide coverage.
How good they are and how expensive they are will be more critical once I get my car done.
I'll be driving it on the street some too , so I will have to do some homework for that also.
Street coverage isn't as hard to find , and considering the investment I have in this thing , I won't be leaving home without it.