The UH-1B was also used as a "Slick" or transport without the weapons mounts on the sides. Usually, there would be a gunner or two with an M60A in the back either handheld, or hung from the door frame with a bungee cord. This method was called a "Free-60". The B model was not used as a transport for long though. The UH-1D followed shortly after it in '64 and pretty much all B and C models were relegated to gunship roles until the AH-1G was fielded in '67.
Here is is a pic of a UH-1B slick in very early full color markings.
You can see the doorgun hung on a bungee cord on this UH-1C Hog as well.
The blade counterweights are next to the crossbar and mount on the blade roots. They are a post with a drum-shaped weight on top. I have circled them below.
You could also have the grunts as a rescue team, evacuating the crew to safety. As long as only the hleo crewmen are injured, it should be ok.
I did a similar dio with a US Navy SEAL HAL(3) Seawolves UH-1C. The crew is being rescued by a SEAL Team and LSSC boat.
Sorry for the crappy pics. I had a cheap digicam at the time.
Hope that helps.
