The first link will lead you directly to information on the 158 Alfetta GP car...the second to mille miglia information...but there is also a bunch of other interesting stuff on the site..
http://ddavid.com/formula1/alfa158.htm
http://ddavid.com/formula1/miglia.htm
http://ddavid.com/formula1/alfa158.htm
http://ddavid.com/formula1/miglia.htm