The dash gauges are 3-3/4" This is one of the standard sizes with most aftermarket gauges. Mounting them and wiring might be interesting though.
Do you have a picture of how the Dakota Digital units look in the car? I got a catalog from them the other day and I know someone that has a set in a 50 something Ford pickup (which looks good) I'm just not sure how they would look in a Maverick?
I just mounted mine to the bottom side of the dash just to the right of the radio. Not the greatest install, but it works. There is an old thread called "Aftermarket Guage Placement" on here that you can search for and see more pics of what guys have done.
Someone here has pictures in the gallery of their dash where they relaced the stock gauges with an aftermarket speedo and tach. I think they used 3 small LEDs for the turn signal and high beam indicators.
Seems like it was Charlie....I had thought about looking just hadn't done it yet; but I remember as well.