Classic Car Insurance

We did a father son project and our Duster turned out great.
My son will be 23 in March.
Is there a classic car insurance company that will insure this car and allow my son to drive it although he is under 25?
I have had the car on my regular auto insurance policy with Plymouth Rock Assurance since we finished it.

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What is the rear tire size you are running and rim width and offset ? Imagine those are 15" wheels.
Thanks