Nice stuff! One day I will have a DS.
I helped buddy install a GReddy block like that by making his mounting bracket for him and I just put one in my '07 STi. Stuffed it in front of a smaller battery, so I redid the in and out for 1/2" NPT to save fitting space, as I needed to turn them down at 45° and 90°. Too bad they don't make a version with the inlet/outlet on the other side!
Called GReddy and they do not make angled ORB fittings. That and theirs seem to be unique and non-standard. I ordered the tapered reamer for prepping the holes for tapping as I didn't want to stress out the somewhat thin casting!
BTW, his first filter block with thermostatic bypass valve did not work properly (stuck open) and oil was not getting up to temp. They sent him a new one. I checked mine and it opened/closed properly. On the STi track car I used the Canton block and Mocal OT2 parts so you get into more fittings and hoses with that approach.