I just found the radio installation manual I got with the radio installation kit for my 715 yrs ago. It has complete details for installing these radios:
AN/GRC- 3 thru 8, AN/VRQ-1 thru 3, AN/VRC 8 thru 10 and AN/VRC-16 thru 18
Complete part number listing an engineering drawings with all location details. These are the older korean era sets (vac tube). I would post it in the manuals section but I dont know how to get it there its 6 double sided legal size pages, otherwise let me know if you would like a copy. I had use dit to install the AN/VRQ-3 in my truck