Here's two quick references I found searching for Highway Emergency Locating Plan that supports this story.
Lafayette Comstat 25
Describes the Lafayette Comstat with 25 channels and future HELP newtork.
Raytheon/Apelco/Webster CB Radio Museum
Second pdf down the page has some hints about the relationship between Ford Motor Company and Raytheon in their development, recommended setups, but also mixes in general info on their RayTel CB's they were trying to sell through Ford dealers. Ca. 1965
The latter reference about Ford/Raytheon is substantiated by a story that I heard from another tech that was a Broadcast Engineer during college and drafted shortly afterwards. He and the other engineers at the station he worked at were given a pitch by the area Ford Dealer's assn. rep about participating in this glovebox radio emergency project as he put it. The rep was clueless about the details, just what it was about and that they would needed licensed techs to oversee the local installations. Don't know why they needed techs unless there was some transmitter work or the radios had to be somehow tuned into the antennas for the base units. The mobile vehicles would come pre-installed unless they were offering retrofits where a tech may have been necessary to do the final alignment. These were tube days and whatever they were using in '65 would have been hybrid at best and use a vibrator or T power supply. They never heard a word again about it, but the achronym HELP was already established.