I want to say [MENTION=15779]z06psi[/MENTION] did that on his.Here’s an idea I have not seen anyone do yet in an S550:
Mount the amp upside down from under the package tray. It’s nearly concealed and won’t take up any cargo space, plus all wires can be zipped/hidden out of way very easily too.
That is how I have an old school PPI 5440 mounted in my 94 Cobra; when trunk is open, most don’t even see or realize there’s an amp in the trunk. I also have mini cooling fans mounted in between the rear package try and amp, drawing heat out of the amp - never ever has it clipped even under max load.
Here's a link to z06psi's thread that has the rack up and down: https://www.mustang6g.com/forums/showpost.php?p=2209206&postcount=148
This.I'd get whoever welded your roll bar in place to weld some flat tabs to it that you could mount the wooden amp rack to...
Do you guys happen to have the measurements for the spare tyre area?