Re: the lines and fittings, if there is any engine failure of any type, the lines ,fittings, filters are all replaced. Wash out any
oil associated part you get.
I got a whole car when wild Bill switched to Dodge and keep it running with team surplus. Most valve components, most components period only run one race. With 20 million a year as a budget, they would feel pretty stoopid if there was a failure of any kind.