If you win your Diminished Value claim, you'll be in rarefied air.
My case: brand new Mazda6 years ago, and less than 500 miles on the Odo, wife-unit gets rear-ended by a teenager playing with his phone. Happened RIGHT IN FRONT of the Farmers Insurance building, which he had for insurance. The car was within $1k of being totalled, was only 3 months old, and again less than 500 miles on - a new car.
After repairs were made, I did my homework and pursued a Diminished Value claim with Farmers based on my brand new car getting significant wrecked. It went up several levels, as I was looking to try and cover the gap on the loan, at a minimum - and after 3 months, they came back and said; "For us to pay a Diminished Value Claim, to establish the reduced value in practical terms, you have to sell the car to someone." In other words, I had to demonstrate - through selling the car for half it's Blue Book - that it was a financial loss... And then, after actualizing the loss, I had to hen pursue them paying to make me whole again so I could go and buy a replacement new car. That was never going to happen, and we both knew it.
At this point, and after the frustration of the experience, we made a hard decision and just kept the car. We drove it for 15yrs, to 205k miles, and it was one of the best cars I've ever owned, as far as maintenance, cost, and overall value. I sold it to a teenager looking for reliable transportation, and he's still driving it.
My point is; trying to get a Diminished Value claim made on a normal, everyday, dime-a-dozen commuter car was unsuccessful. Your attempt to get them to pay you some construct of what you think a unique, collector vehicle has now lost is going to be an uphill battle.
I wish you luck, and let us know how it turns out.