After a few trials, I settled on giving up the use of the storage box in front of the shift console, as I think it's the least intrusive, and safest place. The head is attached with a Ram flexible stem mount, which is attached to a 1/4" thick piece of oak cut to fit in the opening of the compartment I pulled from the dash.
The Sportwagen has a great place to mount up to a few radio bodies. On the driver's side of the rear cargo area, there is a trap door in the sidewall, located behind the rear wheel well. Remove this trap door and you have a solid, removable mounting platform for radio bodies and accessories. It makes for an out of the way mounting location that is easily accessed for servicing the gear in your mobile "utility room". The bodies remain in the climate controlled area of the car, and are hidden when the rolling cargo cover is pulled to the rear.
The Comet NMO antennas are mounted on two stainless brackets I made and attached to the roof rails. Everything is electrically grounded, so after running the Comet CAA-500 Mark II on the setup, both antennas are about as good as it gets.
Power is supplied by a RIGrunner 4005H mounted above the radio body, which is wired directly to the batter with double fuse pairs on each end of the feed line. Power for the FT-991A or any other rig is ready and available for field day.
The Comet NMO antennas are mounted on two stainless brackets I made and attached to the roof rails. Everything is electrically grounded, so after running the Comet CAA-500 Mark II on the setup, both antennas are about as good as it gets.