I thnk alot of width on those units are like a universal size, if not, i think that they can be customised to different sizes. Read below which is a bit of info from the ebay page:
INSTALLATION FEATURES
CAR SPECIFIC SIZED MALE THREAD CONNECTION GOES INTO YOUR CURRENT OIL SWITCH POINT. AT THE MALE CONECTION POINT IS AN OIL TEMP SENDER RECEIVER PORT THIS IS THEN CONNECTED TO A LENGTH OF BRAIDED STEEL OIL LINE AT THE END OF WHICH IS A BRASS BLOCK WITH 2 PORTS - ONE FOR RECONNECTION OF THE ORIGINAL OIL SWITCH AND THE OTHER FOR THE OIL PRESSURE SENDER..COMES WITH A P CLIP TO MOUNT AND EARTH YOUR OIL PRESSURE SENDER.
EACH TOPOT CAN BE CUSTOM MADE TO ENABLE INSTALLATION OF ALL SIZES OF GAUGE SENDER ETC
Hope this helps. Ive ordered one up and getting it fitted next week.