"rocks in a blender" sound in my wife's slant Valiant

We drove the thing with it making noise for three months. Back then, I took out the dust shield because I thought it was hitting. It got gradually louder and LOUDER but still ran fine!

I even drove it into the garage to take it out! When I took out the first TC bolt, I got an ear..Damn! The second bolt and I got ANOTHER EAR.. F#@k! The third bolt gave me the little piece. WTF???
The last bolt was still attached!
It's one for the history books for me..

I changed out the entire engine and trans because I took in a 67 parts car with a good running one. I now know there's nothing wrong the motor. It'll be a good spare.