A very good example of resto cost and value of a 69 Cuda

barbee6043 said

Fact is undercoating help stop/slowdown rust. Many cars rust from the inside of floors, inside of quarters, inside of doors, etc.
Years back,a high end resto was to duplicate factory, period.
The buzz for shiny bottom sides started bout time someone invented the clone!?

Click to expand...

No.

Shiny bottom comes from custom Hot Rods since the beginning of Customizing cars. Autorama, Grand National Roadster show, etc...

there were plenty of customized muscle cars in the 70’s and 80’s show circuits and magazines.

As the value, appreciation, and knowledge of muscle cars in their factory delivered state increased, restorations changed to meet that.

And right now there is a large demand for custom musclecars too. Those custom trends though change with time more frequently.