Here is my plan,  I have a 6U rack mount case already and I am planning to build a GoBox out of it.

Front:

All unpopulated rackspace is filled with blanks or vents

3U Blank Panel with cut-outs for:

• 5″ LCD monitor w/ Raspberry Pi 3 Model B & TNC-Pi
• 2 Front-firing Speakers (1 each for FT-450d and FT-8900r)

2U Shelf containing:

• Yaesu FT-450d w/ Microphone and hanger
• Yaesu FT-450d soundcard interface
• Yaesu FT-450d PTT footswitch/headset adapter cable
• Yaesu FT-450d PTT footswitch
• Yaesu FT-8900r w/ Microphone and hanger
• Yaesu FT-8900r data connection to TNC-Pi
• Yaesu FT-8900r remote Microphone input Headset/PTT Footswitch adapter (Needed)

1U Panel with:

• Lighted [LINE CONNECTED] LED Indicator
• Lighted [BATT CONNECTED] LED Indicator
• Lighted [EXT 12V CONNECTED] LED Indicator
• Lighted [12V POWER] power switch to energize 12V power supply
• LED voltmeter with momentary push-button switch
• Dual Anderson PP 12V outputs
• Powered USB 3.0 bulkhead connected to USB 3.0 HUB

Rear

2U Ventilated Panel

• (Possible) exhaust fan with LED Switch

3U Blank Panel with:

• Bulkhead Mains Power [MAINS IN] Fused/Switched – Common mode Chokes
• Anderson PP [SOLAR/12V IN] – Common mode Chokes
• Anderson PP [12V OUT] – Common mode Chokes
• SO-239 HF Antenna – Common mode Chokes
• SO-239 VHF/UHF Antenna – Common mode Chokes
• SMA External GPS Antenna – Common mode Chokes

1U Ventilated Panel

Yaesu FT-450d provides

• HF + 6M DSP 100W transceiver with ATU
• Full CAT control and programming
• Headset and PTT Footswitch
• Provides HF and 6M CW/Phone/Digital/AM/FM
• 12V supply wiring – Common mode Chokes

Yaesu FT-8900r provides

• 10M/6M/2M FM 50W, 70cm FM 35W
• Cross Band Full Duplex
• Remote Programmable
• Data connection to TNC-Pi, APRS, KISS
• 12V supply wiring – Common mode Chokes

Powered USB 3.0 HUB provides

• Powered from either 12V internal PS or 5V from 12V-5V DC-DC Converter
• Connected to Front Panel jacks and Raspberry Pi
• Allows external media and device charging

Raspberry Pi 3 Model B provides

• Ethernet or WiFi internet connection
• CAT programming cables for FT-450d and FT-8900r
• CHIRP for programming radios
• gpsd for PVT services