Strange noise at idle just started and idle is not steady
 

my 85 GS is having a fit, she keeps moaning (seriously) its like a really strange hollow metal on metal sound and just started getting anxious when idling...just kinda jumps from 400 to 2,000 rpm...anyone know what's wrong with my baby?

Huh... I have never hear of that. Is the hollow sound coming from your frame or the actual engine block? Maybe try a compresion test first to see if you have any blown seals and then work from there?

i think its coming from the block but compression is fine

I bet its the shutter valve that just went to shit!!! Any experts want to chime in?

^^^^^ I'd check the shutter valve like he just said.

I'm really getting tired of thread titles like "Help", eTc...

Learn to state what the problem is with the car. :-)

Sounds like shutter valve also to me.
Do a search with the terms shutter valve to see what the total symptons are and if it matches what is going on with your car.

Way to keep things cleaned up Doc! :)