I don't have a good photo showing the actual tubing but here is a drawing detailing flow for a factory install on a
postwar hydraulic lifter 356 engine. The same is used on 51-4 engines with factory filter. The pigtail is feeding the lifter gallery the majority of the oil supplied by the bottom port. Orifices in a fitting connecting to the tubing going to the filter or in the center pipe inside the filter allow only a reduced amount of oil to flow thru the filter. This is the typical bypass filter system Packard used.
If your tube plumbing is different then perhaps you could post a photo or drawing showing the install so we can see the difference. It may be OK but there is always the possibility someone has done something different.
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