EPA To Prohibit the Conversion of Street Cars into Race Cars

[Pinballer]

From what I recall, the first pollution controls appeared on cars destined for California dealers in 1965 in the form of a PCV valve and a return hose to the air cleaner to re-burn the blow-by. Other states soon followed and all were fully in by 1968 with belt driven air pumps, AIR tubes in the exhaust manifolds and all that stuff. Then in 1975, everything had to have catalytic converters and their associated parts.
The way I read the mandate is that -anything- that was manufactured with pollution devices has to have them intact and original. Not just 90's on up.