If your dash needs an electronic signal and you can provide it with a signal.....but wrong calibration/pulse count, this will let you adjust this +/- 100%

https://www.jaycar.com.au/corrector-...utm_medium=web

Pretty sure it can also convert a VR signal to hall and possibly visa versa if needed.

I use the older DIY version for my Busa clocks to get the speedo working correctly.