I also have mine on the front like Willy's but I think, if you can make it work you are better off too install it on the back as long as you can still open your doors or at least open one. The advantage of having it upfront is that it is out of the way, The disadvantages are, if you are concerned about aero dynamics, and fuel econmy but this would have a minimul effect. As a note, If you are starting from scratch, I read that if you are installing it on the front there are aero advantages to keeping below the level of the top of the hood, so you still get benefits from the rounded nature of that part also so you don';t have to look through it but these as mentioned would be minimal. Having it up front also works as a grill block especially with a cover keeping fouled air out of engine compartment, which is an aero advantage, Some people worry about cooling but I have not found any difference, perhaps if you were towing in hot weather through the mountains this would be a factor but I doubt it would come into play on most vehicles. If you are worried about weight on your doors you could think about installing on the rear bumper or hitch mount. There is also the roof, which is real bad for aero and the other option is to get rid of it all together which some people are doing, Personnally I haven't had a flat tire in over 30 years, there are spray cans you can carry as a back up and repair beads that can be put inside a tire. I think if you have good tires you are very unlikely to get a flat tire but I also understand the peace of mind of having one if you are doing off road stuff.