Jumped Timing Chain?

Well, I'm pretty sure it did stretch. It may not happen a lot, or often, but my crank shaft's pulley backed up about 13 degrees before it moved the rotor backwards, that was starting at TDC, going by the timing chain cover timing marks. The compression is down to 122 with 9.5:1 pistons. Something gave somewhere. Whenever I get a chance to get the timing chain cover off, I will post a pic with it on the car and if it has stretched, it should be just about touching in the middle if not touching at that much of a difference in those two measurements. If I remember right, which doesn't always happen, it is a dual sprocket chain, two sprockets in other words. It wasn't a plastic gear if I remember right. Not OEM, I thought it was stock, but then remembered I think it is a dual sprocket, or at least not plastic.

But thanks you guys for helping be "Certain" it is the timing chain "Before" I took it off... That is a lot of work.