The illustration above is showing a full-flow filter relocation setup. Either on a modified 235 or 261. The 1/2" lines give it away. The bypass filter uses an 1/8 or 3/16" ID rubber line.
Unless you've had your engine modified during the rebuild process, you're pretty much restricted to using the stock GM cartridge filter with the small rubber lines. The stock bypass filtering system bleeds off a small percentage of oil from the gallery and after running it through the filter, dumps it back into the pan. The modified engine full-flow system, with 1/2" ID lines and a spin-on filter, pumps all of the oil directly to the filter and then back to the bearings. In a modified 235 the idle pressure stays up around 25 psi and 45 at speed. I discovered that by plugging the bypass filter holes on a non-modified 235, that I picked up 5-7 psi at idle. This causes me to question the value of running a bypass filter. Do a search as there is a wealth of good info on the oiling system. Hope this helps.
Dave
