[Repeater-Builder] GE low band Desk top units

[Dave]

Hi all,
I have two GE desktop units station comb DM74RAS33
TRANSMITTER TYPE ET-55-A
OPTION 7708
SERIAL 8250914
I am considering making a 6 meter repeater out of one. I have no details 
on the unit. Can anyone help?  Thanks in advance!
Dave