I would list those biggies on ebay, if you sell there. Look up "Amveco toroid". Those 8000 VA (8 kilowatts) ones might be $500+ things even at ebay prices. # 2 AWG wire coming out, holy ******! And you have the tie down straps, too. Those would be astounding items for building a humongous rectifier. Be a shame to scrap them but they are worth something in scrap, too. The condition of the leads and the lack of discoloring on the wrapping makes think they've never been installed.