Help- 90' dodge daytona

alright well a couple days ago i let me friend borrow my car and its a 90' dodge daytona automatic. what he did was rev it up in neutral and pop it into overdrive, i guess trying to spin the wheels ne ways right after he did that the car/engine started shaking so we had to push it back to his place. now the engine shakes ferociously and has barely enough energy to keep the car alive. im thinking its only running on 2 out of the 6 pistons. Any help would be great if anyone might know what could be wrong and if its fixable.