fresh bore, new wiseco piston stock head only have 30 lbs compression, got me stumped!!

 

Replace the crank seals also? This may or may not have anything to do with it,but if the seal behind the drive clutch is bad or has popped out like some have done this can affect compression. The engine has to be able to have a good vacuum from the bottom end to pull in air,compress it and push it along with the fuel mix through the transfer ports to the top of the piston.Lose that vacuum and the engine wont run.This would be the first thing I'd check if you're sure the top end was done right.