My 85SD was rear ended . The insurance company used new OE parts as an estimate of what it would cost to repair. Other guy's insurance company wrote me a check for $3,000 or slightly more and I bought the car for scrap value. You will likely have a similar offer. Try working the settlement price up a little by talking about what repairs you've done etc.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.