I purchased a 1968 Restomod recently and they were going to install this new in the box Gear Vendor, but I decided to have a manual conversion done to the car.

FORD C-4 GEAR VENDORS OVERDRIVE UNIT

Ordered from Home - Bowler Performance Transmissions (bowlertransmissions.com)

I still have the original receipt.

90 DEGREE MECHANICAL SPEEDOMETER ADAPTER (IN PACKAGE)