Vegabond9 wrote: ............... I already have a 5X8 heavy duty trailer with 15" wheels, and a 3500# axle, but the angle iron is UP and would be a hassle to correct it as far as I can see. ...............
I don' t understand why the direction of the angle iron would prevent you from using it. If the angle is turned the "Wrong way" for your use, why not just weld or bolt in somekind of flange to fill the areas that need it. You should not have to box the whole frame to make it work.
Just and idea!