Ideas to consider. The installation of an engine hours-run meter/timer and an external oil tank level gauge none of which have anything to-do or is remotely related to a 914-6 GT.

EXTERNAL OIL TANK LEVEL GAUGE. Useful gauge https://pbase.com/9146gt/image/161948017 for quick monitoring and maintaining proper engine oil levels. Here is a suggested location https://pbase.com/9146gt/image/161948013

ENGINE RUN HOUR TIMER. A quartz hour-meter is specially designed for standard industrial timing and supplying data for the reference of maintenance duration for precision equipments. Featuring waterproof and steady performance, the hour-timer gauge is widely used for tracking time on machinery such as engineering vehicles, various types of cars and other device where there is a need to record hours operated.