Is there a way to tell what the compression ratio of the motor is without taking the motor apart. Thanks in advance.

Not very accurately.. To compute static compression ration you must know: Deck height, compressed head gasket thickness, type of piston (flat top, dished) and you must know the volume of the chamber of the head that you are using, and bore dimension (4.030 is an example). If you know the CC of the head that you are using (64,76,other)
and the type of piston that you are running and the bore dimension it is a little easier to guess at.. I have probably added more confusion to the issue with all this information but I now refer you back to my initial statement.

From David Vizard's Book
105-120psi 8/1
120-135psi 9/1
140 or so for 10/1

Subtract 10-15psi for more radical cams

Just a guideline.

I think that Crash is citing figures that represent readings from a compression test.
This is not the answer that you are looking for!! See my previous post. If you really want an idea what the engines compression ratio is and the engine is stock, simply look up the engine identification by using the codes and numbers stamped on the block at the front of the passenger head. You can find out much information about the original installation of the engine and then can find out what GM set the engine up with at the factory. If any of the engine parts have been swapped or otherwise changed, you may be back at square one.. Guessing..

GO69 the motor is not stock so looking up the numbers won't work. The motor is in the car already so I guess the only way to find out is to take it out and apart. Thanks.