I have three 1984 S 928s. All project cars. Click my Garage to the left in my header to see them.
Go here - Rennlist. This is the best 928 forum in the world. Great guys with knowledge about every nut and bolt on the car. Read the sticky posts and do a lot of searching - everything you want to know about a 928:
https://rennlist.com/forums/928-forum-69/