Only about 10% of the oil flows into the filter at any given time. Mine is a big canister(tall and fat) with a drain on the bottom. I think it came from a bus or a big truck. Any way, it took a few tries to get it plumbed correctly. The drain was the easy bit, just a hole near the bottom. Fit a valve and a line to help with the drain process(it works well and reduces the mess when changing the filter). The "pressure side is the bottom center fitting(and I did take the time to clean it out and push some air through, dirt is not your friend). The side fitting was then plumbed to the "drain" on the block. Found the "filter element" at the local FLAPS after I measured it. Mine was a WIX brand and it is still on the shelves at the parts store. Flow through the filter is center to outside...makes sense, the support screen is on the outside of the element. The most worrisome bit of the whole project, was the Brass fittings on the hoses. They are easy to break if one is not careful. I like the filter, and how it looks. I did run a 1950 216 with out a filter for years. It was fine. Kind of a slow motion oil change system. I was never able to fix all of the leaks, so just added as I went along. That motor lasted as my daily driver to work and back for 7 years, then my Brother drove it for work for another 3 years. Rod bearing failed at around 300,000 miles. Not bad for a 20 year old truck back in the 1970's.
