Shaking continuously

I have the car listed above turbo model.
The car recently had its head gasket blown due to very high temperature.

Before the gasket was blown it had a strange problem such as shaking rhythmically all the time even when driving which is often known as (missing). The car refused to pick up speed in this condition however the temperature was normal on the car.

When the head gasket blew its gasket was replaced so the temperature has come back to normal and drives okay but the (missing) shaking part has not still resolved. The car is still shaking when on road. Mechanics say it had to cylinders damaged and hence the pistons that controlled compression. Now they say the cylinder wall is also burned.

The problem is it is still shaking when stationary and while driven. Is it safe to drive this car? What could be the problem?