I've got 2 sets of Diamond Back, one on BFG T/A's and one on Nitto's. Both have been great tires, and the sidewal changes have held up well. Neither are wide whites. I've also got a set of Coker bias look radials on a 32 Ford. Black walls. 8.20 15's and 5.60 15's. They drive great, a huge improvement over the bias Firestone's I had on the 32.
I've also got a set of replacement size Coker radials from my 55 Thunderbird. They're in storage, and at least 25 years old, I won't drive them anymore. But they drove fine for years, and still look fine.
So I'd go back to either of those guys in a minute. You hear about bad experiences but mine have all been good.
As to American made, I never really looked. If Coker and Diamond Back stood behind them, I was ok with it.