http://www.youtube.com/watch?v=_hcIv0zPnZo
This was posted on the AlfaBB - has some great period footage of Alfa 105s, Suds, 33s, and 75s racing. Check out around the 3 minute mark there is some footage of a Trofeo Alfasud race. Absolute carnage.
;D
top footage - great action. Lotsa carnage in the Trofeo race as you say with marshals on or near the circuit whilst car flash past and lotsa bingles despite the yellow flags. Great BMW thrashing in the latter part.