In addition to the water puddling in the bottom of the scoops, the hoses themselves were notorious for rotting out within a couple of years from new.
Not enough thought was put into the longevity thing back then and unfortunately was just about pushing the cars out the door to new customers.
I do remember a comment aimed at Ferrari decades ago and the reply from Ferrari was that the cars were never intended to last for more then a few years, "go buy another or just buy a Fiat".
That was a prevalent thought of the times kind of reinforced by the 12,000 mile warranty.
Frankly, I remember '60s cars basically being "all done" by the time you got to 35,000 miles. They needed everything replaced and folks who liked to keep their cars new, would just give up and buy a new one for $3,500.
This thing about making US cars successful I remember being campaigned by Brock Yates and basically resulted in todays 100,000 mile plus manufacturers warranties.
As far as 95% of all Shelbys still being around and so coveted was NEVER conceived of even remotely back then.
Heck, even Shelby didn't want to bring the Comp Cobras back from Europe because of the expense since they were "just used up race cars".