You would be surprised how fast repairs can add up on these cars.. IMO I would have left the fucking thing running... if the radiator went.. How much is a GT500 5.4? $15K?
Any buckling on the roof, rockers, b-pillars? $$$$
FDPMS, Shaker 1000 subs/amps, front cover, grills, brackets, hood, fenders, headlights (brackets toast), fogs, markers, radiator, heat exchanger, radiator cover, isolator, motor mounts, air bags, window? rear bumper cover, body work 10 hrs (minimum) Paint to match (entire car), suspension (lcas, panhard bar, UCA and maybe more)? Rear deck lid, emblems, tail lights, rear bumper cover, exhaust (probably all the way to the manifolds), spoiler, clips, retainers, Removal & Installation, alignment, Return to customer detail, rental car.
Check the state insurance laws. Usually if the damage exceeds a certain % you can MAKE them replace it. Do you want to keep making payments on a car that has been rebuilt? Still not the same.. period.