Where would you put your tee for the brake light pressure switch? You may need to change it some day... You need access to the 'brake failure' warning light connector, too.
Ford combination valves usually have a bracket with two 1/4"-20 studs. I drill two holes and use them with lock washers and nuts. Ford mounts them just below and beside the M/C. Where ever you mount is personal preference, but that's where I put mine. You're right Ray, there is plenty of space below the M/C. - Dave