with the valve covers off, see if you see any noticeable difference in the valve height when they are open. turn the motor over and try an compare the lift on all the valves. may be subtle. maybe be really big (1/4 inch)
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.
