oh god what did I break.

[THE "10" SILVERADO]

Problem. On the way to school today in my truck (77 Silverado, 350) I hit the same bump I always do, no problem right? Next light (1oo yards) as soon as I stop the truck starts shaking back and forth. It literally vibrates more than the 67 Chevelle 454 we have. It has never done that before and only shakes in idle. Driving it is smooth and fine.

I have no idea what the problem might be but also today it started smelling like a coal plant. I have the windows down everyday (a/c doesn't work) and it has never done that before. I really hope there was no one behind me with the windows down because they got smelled out.

Please any help would be appreciated.