https://www.yahoo.com/autos/s/old-car-repli...-154854903.html
The biggest change: Replica vehicles will not have to meet modern crash-safety standards, which require technology like traction control and passenger-sensing air bags, along with tens of millions of dollars in engineering expense. The vehicles will have to meet federal emissions rules, and component-level safety rules, but not fuel economy mandates or state-level emissions. And their bodies will need to be licensed from models at least 25 years old.
In other words, you can now assemble a brand new 914 chassis and sell it to be driven legally on the street. The only rub is that you have to meet current FEDERAL emissions standards.