Here's a paragraph from the NHTSA website. How do you intend to get around the engine requirement to meet EPA standards? Just curious.
The way I read the regs, if it doesn't meet EPA standards then you can't drive it on the road at all.
ON-ROAD USE
A vehicle eligible for Show or Display may receive NHTSA approval to be driven on the highway. The odometer must not register more than 2,500 miles in a 12-month period. NHTSA approval of limited on-road use is to allow the vehicle to be driven to and from nearby displays of similar automobiles. Another reason permission is granted is to maintain the vehicle’s engine, braking, lighting, and other dynamic systems in good working order. The vehicle is still required to meet EPA requirements. If the original engine in the vehicle will be replaced with a non-original engine to meet EPA requirements, it must be identified in your application since it may impact on the technological or historical significance of the vehicle.
HOW YOU MAY APPLY FOR PERMISSION TO IMPORT
Your signed application must include, at a minimum:
1. Your name, address, phone number, and FAX number.
2. Vehicle identification - make, model, model year, VIN or chassis number engine number, date of manufacture and mileage.
3. Location where you will store the vehicle in the United States.
4. Statement describing use on the public roads, if intended. If on-road use is requested, identify the Independent Commercial Importer (ICI) that will modify the vehicle to bring it into conformity with the requirements of the Environmental Protection Agency.