an even 30 psi on all cylinders? wow... not good.
did you use the OEM Ford SVT headgasket (not some silly thick one)?
You could try a few drops of oil to see if that bumps your compression up to normal.
Also, double-check your valve lash - Are you sure you got all of them right? If your lash is too tight (or zero), then you won't get good compression.
I'm not sure if it should start with only 30psi... anyone else seen theirs that low?
SCT PRP FTMFW!