I have a 1983 F150, it drives real bumpy too, so the SSD is a good choice over conventional hard drive. The headliner in mine is very thin, so I am not sure there is a mounting bracket for an overhead screen. The plastic headliner speaker mount would probably hold the screen, but if it does not fit, you might be able to mount the same screen on the dash as a flip up instead of flip down from headliner. Many of those type screens support flip screen image switch so it's not upside down.
There are 2 other choices for screens that would work, just not as cool as the overhead, the traditional on top of dash mount that does not flip down, or the gooseneck stalk mount that you can position angled to the driver.