A 10:1 static compression ratio engine with a 041 camshaft will have a lower dynamic compression ratio than the same engine with the 068 camshaft. The 041 has a 230/240 duration at 0.50" lift and an intake centerline of 112 degrees, that would have the intake valve closing to 0.50" at 227 degrees after bottom dead center. The 068 has 212/225 at 0.50" and an intake centerline of 113 degrees, that would have the intake valve closing to 0.50" at 219 degrees after bottom dead center. The 068 starts it's compression eight degrees before the 041, even with it's later 113 degrees centerline. That eight degrees lowers the dynamic compression with the 041 and may make it a bit less prone to detonation with a 10:1 compression using todays lower octain gasoline.
Of course that is not the only reason to choose a camshaft. One must consider the expected use of the car whether racing, street or highway driving and were in the rpm range one wants max torque and rpm as well as the peak torque and rpm values. Then there's the lumpy camshaft lope people seem to like at idle.
