FC wheel bore spacer
 

Just recently bought some MB battles 18x9.5 +15 for my 86 fc and the wheels dont sit on the centric hub and I'm wondering if it would be fine to drive like that or if I would need to buy spacers and where i can buy some . Thanks

All you need is the proper adapter ring. They run like $15-20. And you can run the car with out it but anything over 55 mph you may get some shake or vibration like the wheels are unbalanced.

How safe are those adapters? Thinking of running adapters on mine but heard some sketchy stuff like they brake? Is this true? Sorry not my post..

I have never had an issue, its just a ring that inserts into the hub bore of the rim so that it sits nice and tight on the hub so its centered. I would not hesitate to run them.

Get them. As littlebit said, you can get serious vibration and it's not safe. IIRC they come in both plastic and aluminum. I would get aluminum. I think the better ones are also chamfered/radiused so they slip over the hub easier. Not sure what bore your wheels have, but you need to go to a 59.5 mm.