I'm getting a clatter from the back of my engine. It gets more noticable with higher RPMs. It doesn't do it all the time, seems to do it after hitting a sharp bump and sometimes for no noticable reason at all. Any Ideas?

I experienced the same thing last night. That's why I'm going out to adjust my valves in a few minutes. :D

Is the converter cover loose?

The inspection cover could be rubbing the
convertor or the bolts for the flexpate or
torque convertor might be working loose.
OR?
Hope it is something simple.

Not the valve springs, already checked those. I'll take a look at that converter cover this evening. Thanks!