[66QBird]

I have a 1966 Thunderbird. It's a real Q code Landau. Everything is stock. Wondering what I should first look into to see if I can recapture lost horsepower. I don't think my 428 has the horsepower it should. Don't get me wrong, it runs and drives smooth, but is just kinda sluggish. I'm a novice, so let me know what you would check first. plugs? wires? distributer? compression? Maybe the engine is just getting tired. Thanks.