The last one I did had approximately .577 lift using a 1.6 ratio rocker. There was no interference at all. Using a mild cam with the 1.6 rockers which creates the higher lift makes a decent amount of power for a streetcar. Plenty of vacuum also.
You mean shift to the left by .003 and up .003 that would put you centered. Or very close to center.
With something like you are seeing I would usually measure in more positions to make sure that there aren't defects in the housing at the spots you are measuring