Doug, the Speedhut converter only uses Chrysler, Ford and GM cables (to your oem speedo) and I measured the square end of a Ford cable and it's about .010 too small. Not sure
of the others. I believe the Dakota Digital only drives electronic speedos, but I need to do more research to be sure. I DO know that the one from Classic Innovations cable is made specifically for our speedos. In my case, for a Lotus Elan but same gauge. I know several Triumph guys in my area with this converter box and it works well, however, as I said,
out of stock for a long time, per the owner.
I'm a bit hesitant to buy the Speedhut one and try to adapt a cable, so I'm hoping someone is using some other brand (other than Classic Innovations) and making it work.
Thanks.