Guys,
I spoke to George before putting mine together regarding plugging the gallery while running solid lifters. He is aware lf the mod, however stated "if you had it built here it would not be plugged". That was good enough for me and I did not plug mine. My pressure is fine. I do have the restrictors in place and have 70psi at idle when I fire it up running 5-20wt
oil and a racing fliter. After it warms up, about 25 at idle and 50psi at 2500-3000rpm. I suspect it is your bearing clearances.
Steve