Soon we will see if getting that gauge to read correct, is actually the engine temp at the goose neck
After years of messing with this, I found that 70RA111 is correct as far as getting the old units to make the gauges read right, BUT the thermostat controls temp and head temps run hotter,less water, less flow by that side, etc, so well see what the "gun" says .
If mine wasnt all buttoned up with dex cool installed I would do it myself and make a video.
Its all great info though, for sure.