I am posting in here because I am guessing the “Lump group” has more experience with making non-Jag tech work with Jag tech. I have done EFI conversion to my '74 XJ6, I am using a LINK ECU which has lots of options to configure various inputs and outputs. I replaced the distributor with a AEM Enigine Posision Module (hall effect device). So the computer knows the RPM, but I don’t unless I have the laptop plugged in. Does anyone have any knowledge what kind of signal the Smith’s gauges work off of? Its the XK engine, 6 cyl so some of the issues I’ve read here going to a V8 shouldn’t be an issue. Thanks!