hey, you're not to far away from me. NB here.
I went through all that last year with my 135. It wasnt fun, but learnt a lot.
-New valve cover gasket
-Oil pan gasket
-Rear main seal
-front main seal
-Both oil filter housing gaskets
-Walnut blast
-Coolant hoses
-Turbo drains/o rings
-New RB chra turbos with wastegate repair kit
-New injectors
If you have jb4, id invest a little more and get the BEF. You wont be getting 100hp just with jb4 alone on our gas. I sold my jb4, went straight MHD and looking for a custom tune this spring.
While you got that out, check the coolant hose right next to it. Its very brittle and known to break. Id also suggest a new belt if you had that gasket leaking.
You dont want to break it and get sucked into the oil pan.
Once you got all the maintenance done, its a great little car to drive, especially if you get the fbo.