from what i understand, they only made the TA for one year because it was not competitive. im not sure why that would be, as the 290hp engine actually put out about 350, and the camaro and mustang were also rated at 290...however, keep in mind that the actually SCCA TA challengers had destroked, and much higher performance engines...to look at the challenger compared to the 70 camaro and mustang, it just looks to be bigger, which wouldnt help for TA racing.