Yes I was mostly concerned about the Tach and Speedo.
I often look at this setup, pict below, it just keeps all the guages in one spot. I am a bit nervous about doing this myself on my set up but it would be nice to have some auxiliary guages at times with a bit more precision than the standard temp guage.
Oil temp would be nice, as well as water temp in my case.
I just added Cruise Control and it is awesome on the 4 lane highways.
I often think of building a coupe but I need to experience on first then I can deal with getting it north of the border. Another challenge. Keep going your cars look awesome.