Another thing people mention are the wheel bearings. I have read that if you run radials you should change out the ball bearings for roller bearings. I have no idea about that.
I think that's a myth. I've been driving my '56 Coupe de Ville for over 20 years with ball bearing wheel bearings and radial tires. There is absolutely no problem at any speed. The AD truck has its original wheel bearings and there aren't any troubles there, either.