KD0LSP here...
I don't remember this in the information I studied, so I'll ask just for a a better feel of it being incorrect....
Someone told me that we can't use RT/246 or RT/524's for ham because the bandwidth is to big...
Doesn't seem right to me....
Here is a link to the parts etc manual for the RT/246:
http://g838.org/g838_manuals/tm11-5820-401-34p-2-1.pdf
Here is a link to the ARRL band plan:
Band Plan
Which lists 50.3 to 50.6 Mhz as "Any mode" I am quite sure the RT/246 is legal to use in the 6 meter band, HOWEVER it is just so much easier to just use a radio like the Yaesu 8900 which is a nice small package, And also does two meters, UHF, And 10 meter FM if you wanted to talk on 6 meter simplex.
Old military radios are called "Boat anchors" for a reason....... It is really kind of "clunky" to actually use them.
I have found for the way I operate, I just get a non working (Cheap low cost) military radio that is "correct model" for the vehicle, Pull the guts out of it and cut and hinge the top so it opens, And then install a nice small multi band solid state ham radio inside........ Run the audio out through a military speaker and no one will know....... You could even install the modern day microphone element in an old original military mic housing if you really wanted it to look original.
(With the snip of a diode, Radios like the Yaesu FT8900 are capable of transmitting "out of band" in emergency situations so they could talk with VHF business band, MURS, GMRS, FRS, Marine, Military, etc radios)
A person could even install one of the little "DC to daylight" radios like an Icom 706 series, Yaesu FT857, etc and also have HF capability. So far I just use VHF and UHF in the vehicles with Yaesu FT8800 dual band radios, Which also cross band repeat to little shirt pocket size hand held radios.