Join Date: Feb 2019
Location: Burlington Ontario Canada
The good news, Gubi was correct.
I took my spider to Pinarello Motori and the conclusion, based on a test drive, was the boots were installed incorrectly and the awful sounds I was hearing were normal.
As expected, there were some other issues, such as the idle was too high (I knew that but didn't want anyone except an Alfa expert to fiddle with the spica) and he said it felt like an engine or transmission mount was deteriorating.
They will do a full inspection but I don't think much else is wrong, but the peace of mind is always nice.
Thanks to all who replied.