when a protest is registered it's on. when tech looks your car over after a race, they tend not to get nit picky about model specific parts with mixed make classes. SM or the like? yeah, they might check a final gear ratio, axles, shock PNs, etc...

VERY rare in my experience to see a very invasive tech in IT. ATL region was known for it for a while, maybe just a halo effect from the ARRC.