I don't know what book value is on your car and I'm not sure how Insurance company's work in the US but in Canada they write a car when the repairs reach a certain percentage of the value. Not sure getting a higher estimate is going to get you more money for the Ford. What you can do is argue with the insurance company for reasons, like low mileage, or that it was in excellent condition prior to the accident...be a PITA and they might give you more just to get rid of you.
That sounded rude...but insurance company's have meetings with adjusters and the adjuster doesn't want a claim outstanding to long, he'll get called on the carpet.
Just a thought