I had 4X6 mirrors on the 49. Looked kind of goofy. The PO put a driver side arm on the passenger side so the mirror was right behind the post. So, I ordered the correct arm for the pass side and some round mirrors. I tried to put on the pass side arm and the PO must have drilled the holes in the wrong place cause I still couldn't see it. I think I'm gonna weld up the holes on the pass side and just keep the driver side mirror. I have a 5 window cab, so I really don't need a pass side mirror.