Corvette: top end oiling on new engine - urgent Q

Hi,

I rebuilt my engine and used a fully rollerized valvetrain (not hydraulic)
in the project.
Just started it and everything seems to run fine, except I seem not to have
enough oil on some of the roller rockers (nr 3-5 and 4-6 cilinders), rest
of the rockers seems to do OK.
What could cause this, or is this normal ? If something is wrong how can I
correct ?

Thanks for any answer on this urgent problem

YT