961 Sport Speedo and Tac dimensions and replacement

Id like to replace the speedo and tac with a white face. I found Modo gadget this on revzilla site, hoping it would fit.

https://www.revzilla.com/motorcycle/motogadget-motoscope-classic-speedometer

This Modogadget is 80mm x34mm. Not sure of the 961 speedo dimensions, anyone have any idea? Thank you - D

That will not be plug and play. I am not even considering the physical/mechanical differences . Can you get a pin out of it and we can compare to the Norton VDO ?