I mounted mine on the front of the bed, between the cab and the bed. It was a B*T*H to install because of the lack of room. With 20-20 hindsight, the install would have been a good deal easier if I had undone the 4 bolts holding the bed and slid it hack 6" or so.
As for the single vs duel antenna argument. Blackedge is correct. But only partially so. Performance wise, one antenna will do as well or better than 2. The distance between the 2 antennas is important (9 feet is optimal. With 5 feet being the minimum.) and Rangers just aren't wide enough for that minimum distance required. However, even on something like an 18 wheeler, there are so many problems with the setup, that a single antenna will work just as well.
If you're interested, here's a link explaining some of the problems involved.
Having said that, I too like the LOOK
of dual antennas. So I plan to put 2 on my truck. The one on the passenger side will be connected to the CB. The drivers side will be for the trucks AM/FM radio. I'll then remove the antenna from the passenger side front fender.
Still have to do some reading/research on this setup. Not sure if an antenna designed for a CB will run an AM/FM radio. If they won't I'll just run a splitter on the passenger side and the drivers side will just be a dummy.