There is a cable inside the shift lever tube that is 9 7/16" long. This cable in the parts book is called a "pawl" and is found on all console A/T cars and allows the push button on the top of the shifter lever to move the shifter when depressed. The part number is 2643911.
Here's one on eBay...and for the asking price, I'd look for a used one from a discarded shifter.
1966 1967 1968 Plymouth Dodge Chrysler NOS MoPar CONSOLE SELECTOR PAWL CABLE | eBay
