Na the older muscle cars were shit handling because they were so badly balanced I guess. Probably about 80% of the vehicles weight was over the front wheels. The 82 corvette I got to drive fish tailed out of corners far to easily, and constantly needed corrected in corners, mind you I dunno if they were designed for driving down gravel roads at speed and the fact it was automatic didn't help much, but it was an experience. It was great in a straight line though. The newer corvettes look to be more balanced cars.
As for power steering, I think nearly ever new car sold in britain has power sterring, but its only became standard equiptment in the last 3-4 years.
10-15 years ago, you would be lucky if half of new cars sold ad power steering and 20 years ago, it would only of been luxury cars, and flagship models that would of had it.