I have one of these in my Barracuda. Cheap, accurate, and plugs into cigarette lighter. Amazon product ASIN B07FNHGRZ9
Well- i was trying to post a hyper link to a $37 digital GPS speedometer that is small and can sit on your dash. plugs into your cig lighter. Cant figure out how to pist the link.
I just clicked on the picture and it came up. THANKS! I need one for my 62. That'll be perfect, I'll wire it direct with a switch (no lighter socket, lol)