Here's a few pics of my new Speed Hut electric gauges installed. I wanted only 2 gauges and they had to fit the original bezel openings. Speed Hut built gauges in the correct size and they had a GPS speedo which I wanted. Took a bit of fabrication work to mount he gauges so they lined up with the trim bezel but I think it turned out well. Now if they work as good as they look I will be a happy man.
They are 4 1/2 Mike. Most companies offer 5 1/8 or 3 1/2. These are kind of a weird size but perfect for my operation. A 3 1/2 quad gauge is pretty hard to read.