Use your voice recorder on your cell phone, get a witness, and place a bet with the guy next time that all production Vipers came with V10's. Give him 200:1 odds, and when you've won go get a milkshake.
At one of our local cruise-ins I had a guy come up to me and ask how much the factory option for the S/C cost? I told him it was an after market install, and he asked me again what it would have cost from the factory. I just said about $15K and left it at that.