tractor supply co. 4x8

hey guys, i am wanting to start a teardrop project and i have a 4x8 with the angle iron side rails. is there anyway to make this trailer work for a tear? i am open to any idea. i am wanting to build a basic 4x8 tear, twinky shaped or even a 6x8 or 6x10 tear shaped trailer. i could build a flat or drop 6x8 or 6x10 floor if i am on the rail or a 4x8 floor on the stock trailer layout. HELP! 
