I am gonna break from the majority on this one, I would think it would pick up a .2 or .3 in the 1/4 easily but not in the 1/8th. The duration at .200-.500+ is going to be much bigger and probably a hair less seat to seat duration could build a tiny bit more cylinder pressure and add up to a nice bump through out the RPM range, not just at peak HP. The 30 thou extra lift alone would be insignificant but the whole cam profile is where it would make the difference, still better check PV clearance real close as the extra duration at lower lift is where you will have a problem NOT at the .660 lift.