So.. the next step for the Hotchkis Challenger would be to start running on the Hoosier A6 tires (40 tread wear) vs the newer Mustang also on the Hoosier A6... then.. see who's faster? (The Falken tires are 200 tread wear.. ok for longer life and certain "club rules", such as GoodGuys events, as well as certain "autocross class tire restrictions".)

Take a look at the recent Sept 2013 SCCA Solo National results... class E/Street Prepered (E/SP)... the only tires running all have 40 tread wear.. 95% were Hoosier A6 tires... a few new BFG 40 tread wear tires were also run.

In my opinion, a relatively well-modified old mopar, such as our a-b-e body cars and some others, can nearly equalize in performance to the current newer-generation pony cars, such as the Mustang and Camaro, and in a few, perhaps "lucky" situations, exceed the newer cars. But, the newer cars still have an advantage of having started with an all-new platform and clean-sheet of paper design. The newer car's steering and brakes, as well as wide power-bands, are an advantage they have, meaning more upgrade needed to the older cars. For an older car, such as our older Mopars being fairly well-modified (and they don't have to be over-modified to any radical super-expensive designs, etc), just to be able to simply keep up with the newer generation of pony cars, is a success to be proud of to each owner.

As always, the "nut-behind-the-wheel" (driver) will be the biggest factor in any contest.... the person with the better driving skill will generally have dominance/advantage in whatever they drive.