OK so on the way down the highway the otherday i think my engine finaly gave up the ghost, while i didn't fully granade it i caught it before that it has started to make a really aweful grinding, banging noise from inside the cylinder head. My step dad looked at it and he said that it sounds really bad, he thought that it might be that one of the rocker arms was broken and bouncing aroung, and he was hoping for that. but we pulled off the valve cover and every thing looked find but the noise was even louder. he says that it sounds like a piston pin or a pison rod it broken, he thinks at least one of the pisons it free moving up and down and since it happened on the highway, i am guessing it may have caused some signifigant damage to the engine. but in the end he said that we will proubly have to replace the engine or at a minimum take the cylinder head off drop the pan and replace the pistons. but im not sure what to do. what do u guys think? totaly replace the whole engine? take one i have and rebuild it? how much would it cost do u guys think it would be to take my current engine rebuild it and stroke it?