If it is the standard radio rack up against the windshield in the middle, yes. If it is some other radio rack, I don't know. The vehicle you saw sounds like an M1114 with the latest upgrades. The side armor is thicker, add-on plates and the doors have additional armor as well.
For the vents, you can take a rectangle of sheet plastic and cut slits in it, then bend the slits up into vents. It works pretty well. When it looks like you want it, glue the strip in place on the roof.
Good luck on it.
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