The Excalibur 500 was the performance machine of the Excalibur. It had a racing suspension and was lighter than the base Excalibur. It had a 426 Hemi that was bumped to 500 horse power with a transmision to match wich made this a racing machine not to be toiled with. Its gas efficiency was terrible but thats not why people bought it. This was a drag strip Regular winning many races but because of that these cars in stock condition are rare to find.