Just a shot in the dark here, maybe being a bypass filter the restriction keeps the oil flowing through the engine instead up following the path of least resistance through the filter?
On my 270 the housing holes are the same all the way through, but the brass fittings on the original tubes had a pretty small opening.

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P