Mark, I installed mine under battery box on CB750k oriented exactly as you have illustrated. Instead of bracket I used two high quality tie-wraps and positioned in outboard channels of heat sink. Heat sink is facing down and tie-wraps are positioned under rubber battery base just as you have done with bracket. Also, removing 3 screws to oil tank gave me JUST enough space to snake the unit and tie-wraps into place.
Your unit is an excellent, cost effective solution... crisp, sharp, clean firing across RPM band has raised the bar on my state of tune. I am very pleased! Thanks.
Ted