Did you get an independent appraisal from the insurance company to establish the z's current net worth? I think you were lowballed by the insurance company's first offer. It is worth far more than 8K - for all the work done to it, id say its worth about 20,000 or so. The formula that independent appraisers use to come up with the worth of mods is more than 1 year = 60% of cost, more than 2 = 50% and more than 3 = 40%. On top of the KBB price of the car. U should have fought with your insurance company when you got into the wreck and tried to establish as high as possible value for the modded z. Salvage only comes into play when the cost to fix is more than the net worth, so if you had fought harder with the insurance i seriously doubt from what u describe there is more than 20K in damage.