Seeing the cars don't have interiors, remove the interior camera as an option or replace it with maybe a roof cam or something. Also, I would have at least gotten more done before posting thread, and both @AgentMooshroom5 and @LucasBE are right. Yes, you'd be okay with just posting credits (as per the rules) which is what @AgentMooshroom5 stated, and @LucasBE also has a point. You should still ask to use the assets (assuming you have future plans for this). Otherwise good luck.