Two documented configurations
Farland describes a four-speed manual project. Canepa describes an automatic convertible. Classic Car Center also records rebuilding an automatic. Those accounts justify separate configuration records; they do not identify every internal part.
Follow the power path
For a visual study, follow the gearbox, driveshaft and rear axle as connected assemblies. For a restoration, record the actual transmission tag, housing details and axle information from the individual vehicle. A generic visual mesh is not an identification tool.
Document the hidden side
Photographs should include the gearbox from both sides and below, the bellhousing, tailshaft, linkage and mounting area. Rear-axle coverage needs front, rear and underside views. A clean auction photograph of the body cannot answer these questions.
Original sources
Farland Classic Restoration — 1968 Shelby GT500KR restoration archive ↗
Canepa — GT500KR convertible 8T03R206071-02785 ↗
Classic Car Center — 1968½ Shelby GT500KR recommissioning ↗
Ford / Forel Publishing — 1968 Ford Shop Manual — publisher preview ↗
Publisher photographs and documents are linked for consultation, not reproduced here. Statements about individual vehicles remain attributed to their source.