I don't think you're going to be comforable on a blaster, they're just too small for someone your height. Sure, if you get different handlebars and some lower footpegs you can make it better, but it'll still be more like riding a toy instead of a quad. I'm 5'11 and 180, and I feel pretty cramped on a blaster. But see for yourself, go find one at a dealer or powersports shop and see how it feels. Move around on it, turn the bars, stand up on the pegs, and see if it works for you.
But as a side-note, regardless of if you're comfortable or not, you're still going to look like you're riding a power wheels instead of a real quad because of your size. Blasters are better sized for riders around 5'5 and smaller.