I'm kinda like you as well, I am 6 feet and before VJB I could grab the rim two hands clean and now I can dunk on 1 foot and on 2 feet. So you'll definitely be able to dunk in about a month or two.

Also, I was kinda surprised because before VJB I've always struggled with my two footed dunks and one day after stopping for about 3 days, I tried my regular 1 foot dunks and then decided to go 2 footed. Since I had been squatting and doing the 1-legged bulgarians, I noticed i could plant and take off directly under the basket and dunk which made me really happy. It was kinda like Baron's dunk on Kirilenko, minus Kirilenko. Or how Deron Williams dunks.