Buy, lease, or sell; restore; or convert a hydrofoil ferry, tour boat, or work boat (new or used) descriptions, advice, sources of information, joint venture. Don’t send that old car to the crusher! recycle it the green way by turning it into a walk-behind farm tractor. these free vintage plans show you how.. Don’t forget to add the ooogah horn when you build this homemade electric car for the kids next birthday. these are free plans for a antique auto half-scale replica.