That's when racing was really by the seat of your pants, you didn't have a pit crew to change your tires, and break downs were the rule not the exception.

I saw a few shots of the cars drifting. And they sure didn't have a lot of safety equipment back then either did they?

I just watched a documentary on Ferrari who drove this style of race cars. There was no safety, not even seat belts, and the crowd stood right beside the track.

how fast it can accelerate?

One small point, they're 'Vintage', not 'Retro'.

Awesome automobiles

Retro is nice