I just put a set on my 460.  They told me they were made in the USA.  (I guess I haven't looked to see!)  We're only 100-125 (EACH) cheaper than Firestones but went twith them since I was spending $1800 already for rims, tubes and tires for 15.5-38's.  Sure hope I have no troubles.  I can't say I care much for the dogbone tread design but am thinking it may be a smoother ride down the road.  Had I known I was getting the dogbone tread dessign, I would have spent the money on Firestones. 

I have some American Farmer tires that are made in the USA and they seem good so far but I'm not working any of my stuff at all!  Easy chore duty and thats it.