Did you remove the asbestos or did you leave it on place ?The muffler heat shield is ready to go on
I'll second what Greig says. I found the cones in a pile of parts missing for a millennium from my car .. I thought it was wise to put them back in when I changed the bearing after going 30 years without them and it was a mistake. .. all they did was cause a racket as the spring was binding ... leave 'em off. Alfa was never consistent in the application. Some cars did have them and some didn't.. I opted for didn't.Don the cones or cups are thin sheet metal or tin dust cups, they are simply there to protect the intermediate bearing from crud, stones, low flying pigeons and small children.
I'm sure you replaced the bearing with a new one, probably a sealed one too.... no need for the cups then
Some of my Giulietta's have them, others don't.