The duration on those cams are in the ball park at 213/220 and the other is 220/226. Summit still has the specs listed. Its just a cam so I am sure you could buy something similar in another brand. As I and others have mentioned 220-230 duration will be max. based on intended use, compression, gearing and displacement. I would get a recommendation from a reputable cam mfg of your choice. It would be interesting to see what they come up with.