good read for the new guys to have a guide but for some of us with "road" experience will tell ya the cops will what they want in the end even if your is compliant. i had a 1971 datsun 1600 defected for weber carbies, half roll cage, recaro seats and harnesses, i also had the car engineered but the cops still sent it to regency, regency passed it first go. its funny in 1971 there was no emissions to deal with (webers they said went against emissions) the half cage was mounted in the correct position and there was no back seat or belts in the back, the recaro seats met adrs that exceeded the 1971 rules and the harnesses also exceeded the 1971 "sash" belts that were factory fitted. its funny the cops never pulled out rulers or got on their knees to look at clearances under the car they just picked it and defected it.
2010 toyota hilux single cab
1994 harley davidson softail springer