Some of that information is wrong or the format got screwed up. I don't think the factory came out with a half inch cam and some of the valve size values are screwed up.
Ohh thanks.. that's what I get for speed reading and not checking the article first. This looks better:
1968-1970
Big 2.02 inch intake valves and 1.60 inch exhaust valves, vs the 318's 1.78 intake and 1.50 exhaust
• ‘206’ hydraulic cam - 268 in. dur. - 276 ex. dur. 44 overlap (in 1968, only the 4 speed cars got a more aggressive cam, automatic versions got a cam that become the standard in these hi-performance engines)