Okay, I’ve mentioned the “Sandwich” construction of the K-series, but after cleaning up the gunk in the block and started putting 2 and 2 together, this kinda frightened me.
I sourced these two photos from MG-rover.org . The spindly piece is the stock unit, which I have. The other die casting is the “uprated” version.


If all it did was supply oil to the mains, that would be okay, but the 10 holes around the perimeter are the tapped holes for the head stud long bolts. So essentially, the whole engine is held together by this piece and 10 “springs”.
Of course, I would want the heavier duty item of the two. But ideally, I would prefer a steel piece. My concern in fabricating a steel replacement is expansion rates and potential sheer and shifting. But even this uprated oil ladder/girdle retainer looks – well, kinda cheap.
I know – relax – take a breath – all good advice. Yes, die casting has come a long way, but I’m questioning everything this time – especially a threaded die casting intended to hold the whole engine together.