oil line routing

[danall]

I have recently acquired a 53 3100 truck. From the block/head number decoding it appears to have a 1960 235 truck engine (has bulged oil pan, 4 bolt valve cover w/center fill, etc). This has been modified to use a spin on oil filter using a similar setup as for a full flow oil filter setup but this is using the original side oil ports thus it is being used a bypass oil filter system. The port closest to flywheel is running to the input side of the filter/block adapter. There is a oil pressure gauge line running to an aftermarket gauge at this location and it shows proper oil pressure. Now this is the weird part, the output port on the adapter runs a line directly up into the side of the valve cover (huh?). The adapter has a port for an oil pressure gauge, there is a line running to the original gauge from this port, but there also is a T fitting at this location that runs a line into the lower block original (output) port. (the original dash oil pressure gauge shows no oil pressure. I'm assuming that just dumping into the valve cover is releasing oil pressure, thus the line going into the lower block channel also is void of oil pressure. Is this a critical passage, does the oil just dump into the pan from there or does this (the original lower/frontmost port) directly provide oil to a bearing location?
I'm looking at redoing this setup, blocking the line to the valve cover and running properly to the lower channel. Pict attached, hard grey line is the port closest to flywheel (input), black hose running upward is the line to the valve cover, and the T joint location has a oil line to gauge and a black hose line to the lower block output port. This any sense?