The V8 radiators are all 3 core. the 75-76 have no cap in the top tank. They used a cap that was in the upper rad hose. The 77-78 all have a cap in the top and you can easily see the three rows of cores inside. The radiator is very large compared the the other two. Top hose connects on the pass side bottom on the drivers side. It goes the full width of the opening on on the core support.