Advice on a blown engine for an 88' GQ SWB Please!

[aliamus]

So, exactly what happened when you thought the engine blew itself?

I heard a like a flapping sound coming from the motor as I was driving, about 30 seconds later the motor made a loud, nasty sound. I immediately lost power and pulled to the side of the road. Lifted the hood and the motor was smoking. When you turn the ignition you hear a thud sound.