The AN/MRC-107 A consisted of:
AN/GRC-155 Communications Pallet, AN/GRC106 transceiver, AM3349, power amplifier AN/VRC 64 radio set, control radio sets HF C-6903, UHF C-6904, VHF C-6902
For vehicle M151A1, A2 1/4 ton truck (modified with overload springs and a 100 amp generator) and/or M416 trailer for ac/dc Generator
When the HF radio systems were upgraded, both pallets received an "A" suffix as did the overall designation, i.e., MRC-107A and MRC-108A
The AN/MRC-108 had the AN/GRC-153 pallet.
Thanks to Dennis for his assistance