Don't know about you guys but I'm not seeing the 429...
http://www.ebay.com/itm/Ford-Mustang-1971-ford-/290980307461?forcerrptr=true&hash=item43bfc72205&item=290980307461&pt=US_Cars_Trucks
http://www.ebay.com/itm/Ford-Mustang-1971-ford-/290980307461?forcerrptr=true&hash=item43bfc72205&item=290980307461&pt=US_Cars_Trucks