Hi Guys, The Original GTD gauges were smiths, Then they went to Stuart Warners that were pulse sensing. Then they went to Voltage sensing (which you can hook right up to the MSD. The Caerbonts use Volt sensing too realizing that pulse sensing was no good for todays electronic managements.
When I used to build Cobras years ago, I used to go to the Scrapyard, hook out all the Jaguar smiths gauges, take them to a guy in my old town that changed them from 6 cyls to 8 cyls, changed the speedo to read 180 mph and re calibrated them for Cobra rear tyre set up, all for £40!! Those were the days! Now a gauges set is £400!
I will wright a book one day!
Cheers
Mark Sibley
MDA