i know its a different kind of racing, but i agree with the 500 car theory, because if you look at MOST racing, from nascar to tha trans am series, but 500 has seemed to be a lucky number, look back to 1964, MOPAR came out with the HEMI, they only released a very small amount of these "Street" hemi's, Ford with its Imfamous "Sohc" motors which were in the falcons and other models in both Nascar and NHRA, Pontiac with its 1969 Trans Am, 1968 with mopar again the Charger 500 (hell its in the name and it wasn't a wing car like the charger daytona's and Plymouth superbirds) Ford with the Boss 429, and Super corbra Jet Mustangs and again with the NHRA and NASCAR usage, the 68 AMX was used in the Trans Am series, again in 1970 with the AAR 'Cuda nd Challenger T/A's... know i know that these are domestic examples, but the history is there... and if there was 5000 cars that were released, i guess we lucked out...Kaz