I have both the field monitor and the inclinometer and from looking at it you probably could if you did some cutting and shaping but it probably won't be easy to get it to look good.
I am currently trying to get a molding of our dash to make a fixture for the inclinometer to sit flush like it was intended to. I'll make sure to post it when I get it to work.
I know some people fit it in the stereo location after cutting the edges of the inclinometer.