My other challenge has been trying to find a scrapyard around here that will sell to the public, not too many around by first appearances. (They'll accept from you, just don't want people poking around for insurance reasons, etc)
Also, the part I'm trying to wrap my head around, should I need to harden, is not so much the heat aspect (really big fire, no big problem. I have a place I can go do that...) but the quench. I'm assuming it's going to be nearly as difficult as quenching an anvil, in that I need fast-flowing water?