273 adjustable rockers on 360, very little oil to springs

They don't have to match up perfectly (thoughI am not encouragin sloppy installation work). Even if they were offset by as much as 30% of the diameter, the resulting flow area is still larger than the smallest oil flow restriction before reaching the rocker shafts.

That smallest restriction is where the rocker hold-down bolt goes through the hole in the rockershaft, right above where the oil comes out of the rocker stand. The flow area of that smallest restriction is less than half of the flow area in the cam bearing holes.