9-1/2" tall in front
7-1/2" tall in back (tapered to fit)
The 2 x 4s that cantilever the dash fell out, so instead of trying to put them back I built this with the help of a woodworking friend. I couldn't see an easy way to put the 2 x 4s back, and it seemed like a cheesy setup.
The support is wedged in there pretty tight, but can be slid out if the doghouse has to be removed for some reason. In retrospect, it should have been built with more surface area on the bottom.
2015 FR3 30DS