My Nov 68 built SJ Mach 1 had the ribbed lid when I bought it over 30 years ago.
It had splits at the corners so I changed it to the Mustang spec type.
Since Cougars came down the SJ and Dearborn line too, workers didn't always get it right.
I've seen blue, red, green, brown consoles on eBay and the flock has always been black IIRC, but it's not something I really took note of.