The build was based off a Minnesota car featured in Car Craft magazine a few years back that had dog dish caps. I thought it looked pretty cool.
remember, cars were ordered basically piece by piece back then, the magnum 500's could have been a deleted item. say a person wanted the upgraded interior in the GTX and cut the cost by deleting the wheel/tire combo to keep the price within thier budget. strainger things have happened back then.
great build by the way. one of the better GTX's i have seen.