My proportion

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I am 18 years old( I stopped growing at 15) and my height is 174 cm in the morning, and 173 cm in the evening.
My sitting height is 96 cm.
And my wingspan is 173cm, I would say only 173 cm.
My tibia is 40 cm, and my femur is 41 cm, but I am not sure if I measured it right, I hope I did.
I'd want to be tall between 183 cm and 187cm.
Well, would I look disproportionately with that height?
Can I get these 10-11 cm by one operation?
I read that the higher you are, the more centimeters you can gain. Is that true?
Every advice could help, thanks.

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Also, I am good candidate for LL?

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But a lot of guys here menaged to lenghten their tibias for more than 8cm. The average is 7,5cm I think. So they are not funcional now or?
Okay, then, what could help you to judge my proportions? A picture or?
And I'll ask again, do you have better ability for lenghtening if you are taller? Or it's just a myth?