1974 Pontiac Parisienne Engine Mount

Hello,

I recently put oil in my engine, but since the oil was low before I got it changed, I wanted to coat the parts of the engine, so I started to rev the engine. Suddenly, there was a bang, and my engine stopped running. Then a puff of smoke came out of the front of my car, I popped the hood, and nothing was on fire, but the engine was leaking coolant near the engine mount. It looks like the mount broke, but I can't see what else is damaged. Nothing appears to be dented, and nothing was on fire, but now the car does nothing when I turn the key.