Are you just born with it? Because most of the guys his size are slow and gas out really easily. They may have power but they can't slip and throw consistent punches.
You need great strength in relation to your body-weight, then you train for power and speed mostly. It takes a few years of focus on strength (say about 4) utilizing high level trainers for powerlifting and then when you reach great size and strength, you work on your bodyfat percentage. That means you eventually need to get down to a weight that retains a lot of the muscle, but gets rid of a lot of the fat that comes with not worrying about your diet in favor of physical strength and size.
So eventually you start working on your diet. As you shift your focus from powerlifting, which is utterly useless for sports with extremely low contact times aka striking, to weightlifting. I say it's useless, but the ironic thing is that it's also essential to them, because that form of training builds a base strength that few other sports if any can build. The force - time curve will allow you to understand how things work. Essentially training for power development makes a lot of sense for someone that is extremely strong, be it naturally or through years of training to be strong. The weightlifting will turn your unusable strength to usable force during efforts that are accomplished in much shorter amounts of time.
Have a look at the force - time curve above please. As you can see you can manipulate said curve through different variants of training. Most boxers will do a lot of skill training obviously, but they will also devote lots of time on ballistic strength training. For this you do not need to be extremely strong and you also don't need to have a lot of hypertrophy. In fact, you'll have to work a lot harder at explosive strength and then ballistic strength training to have the same speed as someone that carries a lot less weight. The same holds true for stamina. Muscle needs to be fueled and it's a lot harder to maintain hundreds of repetitions of near ballistic movement over longer periods of time, when you have a lot of muscles to move. So basically a bigger more muscular fighter will have to work a lot harder for his stamina to be good as well. You can see this in any UFC fights involving bigger and smaller guys. The small guys after 4-5 years of training can just keep going and going and going without gassing. Bigger guys that do the same thing in training will not be able to sustain an equally high pace and if they try, they gas out a lot earlier. Instead of raising the already high work capacity runners often opt to slim down a little towards a race, because carrying a few pounds less often has a more pronounced impact on running times than can be achieved through training, especially in the short run.
Now let's have a look at the curve again. Maximum strength training is good for raising the end point of the curve up. It will have no immediate effect on ballistic or near ballistic movement. However, it does raise starting strength, which will help a little bit. That effect is masked due to hypertrophy and the higher load that comes with it though. Once you start to train for power, because you have a very high maximum strength level, your movements likewise become more explosive. The rate of force development gets higher and you raise the middle of the curve up. This effects your speed quite a bit, especially for powerful shots that you load up a little on. The jab and other more ballistic movements will see a good bit of improvement as well. The real improvement comes, when you have very high levels of explosive strength and you work primarily on speed through plyometrics and ballistic movements like those utilized in a lot of boxing training.
Over time you need to get more and more technical and specific. You also need to work very hard on your stamina and as you can see you'll need to work up to an extremely high work capacity to be able to withstand all the extra training that goes into being able to maintain a high pace as a athlete that primarily focuses on the type of fibers that utilize the most energy. It's tough to design a training plan that does all of these things for the right amount of time and at the right time in your training cycle. It's nearly impossible to work all these things, strength, power, speed, stamina at once, once you pass a certain threshold. What works well for beginners to do exactly this won't work for a highly advanced athlete.
Most boxing gyms will neglect strength entirely and usually actually true power-training as weightlifters do as well. They will never work on the base, because some people are born and have the right background to be extremely strong and powerful and thus they need less work to get where other need years of solid programming to be. Mike Tyson was a physical specimen, a one in a million type of guy. It'll take about 10-12 years of doing everything correctly and utilizing very advanced training planning and some luck to stay mostly injury free for a mere mortal to get to that kind of strength/power/speed while maintaining or acquiring good stamina.
So focus on strength first and foremost for a number of years and be fine with not having the stamina to compete with your folks yet. It will be o.k. if you can't go hard for many rounds. Your endurance will get better eventually, but it takes many years. Then focus on power, when you are very strong in relation to your body-weight while dialing in your diet. This should help with your stamina a little already, but once you are at that level it would be very good if you started your periodisation with an endurance part. While it will negatively impact your maximum strength, the strength was just a means to an end, not your long term goal anyway. So while you work on becoming very powerful, you will also need to read up and study running training, so you can devise a periodisation that works for that. You'll not want to do any fast runs or high intensity methods such as alternating sprints and jogs at any time in your training, that you want to focus on power and speed development, so you need 4-6 weeks allocated for that specifically, so you increase your endurance from periodisation to periodisation without impacting your power development too much. Then when you reach a very high level of power in relation to your body-weight and have a fairly low body-fat percentage with a solid heavyweight build, you'll want to work on speed and stamina over everything else, which will be slightly detrimental to your power development, but then again, this was also not the main goal for you. So as your focus shifts to maintaining power and increasing speed through plyometrics and all those fabulous drills that boxers do to increase their speed, you will eventually get to the point, where all that matters is your speed, stamina and most of all your technique.
So you have to work diligently on your technique and since the above will most likely span 10-12 years to get to an elite level, you'll have time to learn the basics of sound boxing fundamentals and focus on them for 4-5 years. You'll also learn to get hit and lose quite a bit, because you will not be able to content on stamina and speed as your build your base to greatness. Then as you progress and become more powerful, you can start picking up on the Peek-a-boo style and as you become more powerful and increase your stamina, you'll start holding your own in your gym, just not against guys that were born powerful and had years of training at that power/speed level to see what works. So the more experienced guys with better genetics will still beat the shit out of you for a good while. Once you have a few years of experience with that hard to learn style, have gotten your body-weight down to a more favorable weight-class and have increased your stamina to competitive levels, you'll be able to content with a lot of folks. Then comes your focus on speed and technique and you'll need a high level trainer that focuses on the style of boxing you want from that point on. If you get lucky and you don't get injured and build up the necessary work-capacity over the years, you'll be quite the phenom when you start of with whoever it may be and through a few years of focusing on technique and speed you'll surpass all the more talented guys that used to be able to beat you. If you work diligently on your stamina as well, then you could become a heavyweight contender over the next few years. Then you'll have about 5-6 years at the height of your career, where you'll need a lot of luck to become a champ (the problem comes with others working harder than you and especially those that started with what you trained for many years to get). So if you are out of luck, then a Mike Tyson that focuses on speed and technique for 10 years is competing with you, that has only boxed at that level for a 2-3 years if that. You'll likely get beat badly if that happens. Then you may also run into a juicing Mike Tyson. Maybe you get lucky and become a champ. You'll still have to win a boatload of fights to be worth many millions for title defenses, so that it's all worth something in the end in terms of money and status.
And then again, it's tough to say if Mike's boxing style was really the best, even though it worked remarkably well. We don't really know how he would have done, had he trained to fight differently perhaps at a lower body-weight with a more refined modern boxing style. I know nothing about boxing, so I have no idea really, but even if I knew boxing inside out, it would be impossible to know without a time machine or being able to watch many parallel universes at the same time.
Good luck with your endeavors anyway.
