AyM Sports recently aired this show. Among the fights shown was Francisco Reyes vs Marcelino Bojorquez and announced as a 10 round fight.
Also Manuel Cardenas vs Jorge Valenzuela was scheduled for 6 rounds, and "heavyweights" seems unlikely. They didn't look that big but Valenzuela was announced as 85kg while I couldn't tell the exact weight of Cardenas...80-something. So that puts them at cruiserweights. As I recall, by 2007 the cruiserweight weight limit was already 200 lbs (91kg). Maybe I'm wrong about that.
Anyways, the Reyes-Bojorquez fight was annouced as 10 rounds (which is missing) and the Cardenas-Valenzuela fight was announced as 6.