I suspect you will find what most of us have, which is that the concentrated sugars in fruit juice are just not worth the hassle of trying to cover with insulin. (Though I can't tell, are you using insulin, or pills, or nothing? I'm going to assume insulin, though much of this applies even if not.)
Yes, in theory, you could take a very precise serving of fruit juice, and you could time your insulin to cover it fairly well, but the usual rule is big inputs lead to big outputs, i.e. having a bunch of sugar, and trying to cover it with a bunch of insulin, will almost by definition lead you to go very high or very low when you make slight errors in one direction or another. And it's not just about high and low, it's about riding the blood sugar rollercoaster as you try to correct it. If you're not using insulin, if anything all of this applies more strongly, because then you have no tools to try to compensate for that glass of sugar-water you've just consumed, other than perhaps exercise.
180 morning blood sugar, when your goal is 108, is not "a bit higher." It's the difference between having functioning eyes, feet, kidneys, and a heart in a few decades. Seriously, diabetes is the leading cause of adult blindness, kidney disease, limb amputations, and heart disease in American adults (and adults elsewhere, too).
Sorry to come on a bit strong, but hopefully this helps put those fruit juice cravings in context.