Are you sure the pressures are correct on all 4?
Pulling to one side is indicative of low pressure if no other parameters have changed.
Unless they gave you a lower profile tire on the rear by mistake.
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspension, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas. What do you say, is it the new Bluesmobile or what?