hey there mate, well ive done my fair share of vjb programs, heading onto my 4th and the best way for you to go is just start of at beginner plyos and novice strength, its always good to begin getting a strength base. The reason why you jump the same running as a 2 step is because you lack plyometric efficiency and reactivity, All it is is correct and motivated training and you should be dunking after this first program.

I would definately not do any intermediate program as yet as your 6'4 probably mid 8'0 reach bringing your vert to like 20 inches. You may well be able to squat 1.5x your bodyweight but its always better to start from beginning.