Concours condition cars are the best in the world. The visual image is of the best vehicle, in the right colors and very clean, the vehicle has been groomed down to the tire treads. Painted and chromed surfaces are mirror-like. The materials used are correct and superbly fitted. Matching numbers Body, Engine, and Transmission.

Because it is six years and 2400 miles since the build she is no longer considered true Concours condition. This beautifully restored Corvette is now conservatively priced and offered at Hagerty condition Excellent. Keeping in mind this upgraded LS5 engine was built to LS6 performance levels, a standard far exceeding that of the car when it was new, and the rolling chassis was built to NCRS standards.

+$65,000 LS5 coupe, base model, condition Excellent.  
  +$2,000 for a/c.
     +$900 for custom interior (leather).
  +$2,500 for pwr strg.
=$70,400 Hagerty fair market appraisal with stock engine.
  +$8,000 440hp, Blueprinted, port and polished with EFI.
=$78,400 Adjusted fair market appraisal.

https://www.hagertyagent.com/apps/valuationtools/1971-Chevrolet-Corvette