Is there a insurance company in NJ that will insure an old car?

I'm sure that there is a company that will provide the coverage that you need. I always suggest that people go and speak with an Independent Insurance Agent because they contract to sell insurance for many different companies and therefore have access to many different products. A captive agent who works for one insurance company works for that company and can only write the coverage provided by that company which usually very limited. There are specialty companies who write coverage for antique vehicles and do an Excellent job at providing this coverage. They market through independent agents in order to offer their products.