they are 8 bolt , champ used same casting for 8 and 14 bolt.
the 8 bolt version looks identical on outside but under the covers has stock iron type pedestils and can run stock rocker shafts and stock covers , you also need specific length pushrods and specific bolts (or studs) to use these.
if you run T+D rockers you need the tall valve covers or rjc spacers for stock covers.
if you run T+D roller rockers you have to get them specific for gn1 aluminums , iron head T+Ds wont work.
the early 14 bolt got the pedestils milled off and individual chevy style rocker shafts drilled in for scorpion rockers , the extra bolt holes for stage (TA) blocks was drilled between the rocker studs.