Unfortunately the exact specs for the factory cams seems to be unavailable, at least to the average guy. I'm sure there are guys that have been doing this forever that know the specs or have measured factory originals. The problems with any of the published factory specs (service manual, DC manual etc.) is that they don't specify at what lift the duration numbers that they list are at. And without that info your guessing. From what i have seen that is available, the crane 'blueprint' cam is pretty darn close to factory specs. But that's for the HP cam. You'll probably be able to find max lift and LSA specs, but the duration specs are going to be a chore to find. Good luck and keep us posted.