[bryant99]

You can reuse the old tank as long its not a ton of rust in it and no holes.Some do prefure getting a new tank just to be safe.When a car has sat for several years its wise to flush the fuel lines and check for rusted out lines and replace the rubber fuel lines.Just to get the car running better do a full tune up plugs,cap,rotor and wires,change the oil and tranny fluid and filter and check rear end oil to be safe.It might not hurt to flush out the braking system and check the brake pads and rotors and check the lines.Its best to be safe than sorry when out with the family in the car.Do check the tires for dry rotting.Simple mods are good as advance the timming.I haven't seen to many mustangs being slow unless its been rode hard and put away wet.