Now this one is old school.
You will see a black ring I had to fab around the gage, well this was so it would fit and hold into one of those gage cage clusters that fit in the a/c vent or and cluster for that matter before Autometer made the right size many moons ago.
You will need a sending unit but those are cheap.
$10.00 obo..
PM me here or e-mail:
nosgears@yahoo.com