Im in the process of replacing my rings atm so im pulling off the head and in the mean time im checking the turbo life and fixing a few issues while i have everything apart. Im also installing a LSD and a new exedy racing clutch. I have come across a few issues atm which i need help with.

1. Turbo fins have some gashes + intake bore is extremely rough + has minor shaft play. Do you think rebuild? or new turbo? or is there anyway i can upgrade this turbo with a bigger housing to support 400hp or over?


2. I painted over my ceramic coating about 1 year ago with Exhaust manifold Paint but its pealed off. Does anyone know how i can get this painted so it wont peal off? Do you use some sort of primer? cos i just cleaned it up and painted it.


3. How would i go about getting this stud out of my head so i can replace it with a new one. Its always been stuck in there and every time i pull the mani off i think "it should be alright with missing" but as you can see there is leekage which i need to fix. Do i drill it the rethred? should i get it professionally done while the head is off?