I'm trying to do myu timing but it will not turn anybody have any ideas why I have the one screw loosened
any other sugestions

 

maybe... you have weak hands?
It is just a rubber o-ring gripping onto the aluminum, maybe some caked on oil below the rubber o-ring. Just grip onto the CAS hard and turn it. Thats all there is to it.
Try getting it moving without the engine running, then start the car and use the timing light.

 

Is there ever a reason to mess with the timing if the 3-pronged plastic gizmo is still covering the bolt, and timing was never (as far as I know) changed? Doesn't it always just stay set where it is?

 

Advancing the timing often results in some extra power, as well as lower emissions.

For motor swaps (like he just did), timing is necessary.
But for your statement, yes, timing will not change unless someone moves the CAS.

Sean Cathcart