Help! Small block 360 has a knocking sound

I can tell you my car sounded like it had a rod knocking too. Looked at converter bolts and did not look like any were loose and did not see where it looked like they were hitting the dust shield but I did not put a wrench on them. Took it to a shop and $200 later they told me the converter bolts were loose. I would put a wrench on all of them.