How much down is the low lift flow in your W5’s??
As valve speed goes up and lift goes up low lift flow (with the exception of overlap) becomes less critical.
You can’t use a bad valve job and kill low lift flow and expect to make good power.
Also, at overlap the port pressure is much higher than 28 inches of WC. So the port may look bad (or maybe weak or weaker is a better term) at 28 inches but at 45 or 60 inches or even 100 inches if your bench can do the last two may prove out that the low lift flow numbers aren’t as bad as they look.