Yes. STB's generally (though can't speak for every type that might be around--just the ones I sell/use) bolt to the studs of the upper mount/plates which don't move. The there is a second part underneath the tower that allows for the adjustment.
I have installed MM and Steeda HD mounts with a variety of STB's ranging from Steeda, to the OEM Bullitt and Shelby braces as well as UMI's and an Edelbrock (two versions now available).