My 1958 Shop Manual does not make a distinction between camshaft specs for the 235 and 261. The whole rebuild section treats them as the same. Going back to the idea of the Corvette Blue Flame 235, which started in 1953, I concur that originally the 235 and 261 had different cams. I would appear though, in 1956 or later, that Chevrolet engineers said, "Hey, lets use the same cam in all the 235's and 261's cause it creates better numbers!" That is what I am seeing.
