Do I have good distance in my golf game?

I drive the ball around 260-300 with my driver and 3 wood my irons I can go around 155-200 and when I play a round of golf I normally can hit around 65-75 on a 62 par course and I am 17 been playing golf for about 2 - 3 years and had professional lessons I have a decent muscular build but have a fast swing my golf coach says if I work on my mechanics a bit more I could probably drive around 325-360 and hit my irons about 200-240 any thoughts?