1971 340's True HP?

71's are the hottest of the 340's with exception of the 6 pack 340's. I wouldn't dought 295 to 315hp depending on how close to spec the deck hight and head cc's were. The carb and intake are quite a bit better than the earlier ones, and the exhaust manifold's from some testing that I have seen are only down about 2hp from the 70's.