Turbo install questions?

[DiamondStarAwd]

Okay so I have pretty much everything for my 50trim install. I get to the oil feed line. I have the 4an line and 90 degree fitting to go onto the turbo. I get down to where the oil filter housing and the adapter I have is to big. This oil line is from my old 90 1g feed line and Im guessing 90 filter housings take bigger adapters for the 4an. There are two holes, the right one is open, the left one is plugged. The left one looks to be the right size but what size thread is the right hole?


I'm also installing ssac fmic kit, 780's, fpr, 255. I'm sure I will have more questions so I will just add to the thread

 

[DiamondStarAwd]

I have an o2 dump as well. On the t28 I have it has a stud on it to go into the o2 housing because I can't get a bolt in there. Where would I find a stud the right length and thread for the 50 trim to allow me to put on the o2 housing correctly and not missing a bolt.