I went with a poly 16gal tank from summit for my 52 3/4 ton. I mounted it directly behind the rear axle but inorder for the fittings to safely clear the swing of the axle I moved the rear crossmember back about 2-3 inches. Its a very nice tank and I believe it was well worth the money. It has a foam insert that keeps the fuel from sloshing around and keeps the tank from busting in a impact and also came with a fuel level sender. Fits nicely inbetween the frame rails and will be filled with a fuel door in the bed floor. http://store.summitracing.com/partdetail.asp?part=SUM%2D290108&view=1&N=700+150+4294920243+4294894961+

Last edited by drummin52; 07/10/2008 6:57 PM.