You're trying to setup a stock bypass filter system - which uses the old Fram style filter that is typically mounted on the head. This is NOT a 95% oil filtration system (which takes specific block modifications). Also, as far as my math goes, is really a 66% oil filtration system - as 1 out of 3 of the mains does NOT receive filtered oil. Folks claiming 95% are using creative math to make themselves feel good. LOL
On a bypass type system, you must have a restrictor on the inlet side of the filter (usually it is a brass fitting on side of the filter - with about a .060 to .080 orifice in it). The outlet from the filter goes to the pan. If you don't put the restrictor in, then you greatly reduce oil pressure (and volume) as you are dumping a lot of oil to the pan - and not to the oil galleys.
You just need to obtain the right fitting adapter to go from the block to whatever line you're using. If the line has compression style fittings, then you'll need an NPT to compression style adapter.