Don't be so sure about the emissions control waiver. Take a look at this:
http://www.epa.gov/oms/imports/kitcar.htm
"4. The production, sale and importation of vehicle parts (engines, transmissions, chassis, vehicle bodies, etc.) are not regulated by EPA because parts are not considered motor vehicles under the Clean Air Act. However if the parts constitute a disassembled vehicle or an approximate disassembled vehicle, the combination is considered a motor vehicle under the Clean Air Act. Any attempt to use this policy to circumvent the Clean Air Act or the Imports regulations will be considered a violation of the Clean Air Act and will be strictly enforced. "
A rolling chassis based on a 2009 production model could be considered an "approximate disassembled vehicle."
I'm sure the AEV website will provide guidance on this subject when they start offering the J8 for sale.
Chip Haven