Not the answer to your question but alittle history.

"Dodge tried to "rally" a little for 1973 by offering a larger 360 V-8 as the Challenger's top-dog engine. With 245 hp on tap (five more than the previous year's 340), it was respectable -- for 1973. Production upticked slightly, to 32,596 units for that year. But the car's fate was sealed nonetheless. Dodge weighed the expense and hassle of keeping the Challenger viable in an era of ever-more demanding federal regulations against flaccid sales and shifting buyer tastes -- and decided to pull the plug. 1974 would be the final year. No major changes would be made for the final season since Dodge had already given up on the car. Just 16,437 left the factory -- and as December 1974 rolled into January of '75, the Challenger slipped away into the history books.

Yet in spite of its brief and abruptly ended life, the Challenger (along with its sister E-body, the Plymouth 'Cuda) remains among the most memorable and most-loved of classic-era muscle cars. It stood apart at a time when outrageous power and throbby styling were par for the course -- pushing the envelope farther and harder than most of its contemporaries. "