I have found the solution for HUD and FOV.
Open iinfo.lua located in:
C:\Program Files\Eagle Dynamics\DCS World\Mods\tech\CombinedArms\Cockpit
Change the last line
dedicated_viewport = {LockOn_Options.screen.width/2,LockOn_Options.screen.height/2*aspect,LockOn_Options.screen.width/2,LockOn_Options.screen.height/2*aspect}
by:
dedicated_viewport = {singleMonitorWidth/2+singleMonitorWidth,singleMonitorHeight/2*aspect,singleMonitorWidth/2,singleMonitorHeight/2*aspect}
Example (5760x1080 resolution):
dedicated_viewport = {1920/2+1920,1080/2*aspect,1920/2,1080/2*aspect}
Also I have found how to increase the fov, I have it working but I must to filter what of the files altered is the key