How did frame design of the more powerful cars in the 1960's affect vehicle handling?

The uni body construction reduced weight and increased body flex. However consider tire design as well as shock absorber technology then. Tires were bias ply construction with considerable sidewall flex do to 70 series profiles with a maximum of 7 to 8 inches of contact on the road. even the most advanced frames and suspensions of that time IE Corvettes , cars then were and still are scary to drive even now. Disc brakes were only a option NOT standard equipment unless you bought a option loaded car such as Gt Mustang , Corvette or Super Sport and on certain cars you had to order disc brakes to get them.