Should I lose some weight before booking a BBL & Lipo 360?

Hi and welcome to our forum!
At your present weight, you would achieve a degree of improvement with BBL, but the result will not be optimal.
Your candidacy for cosmetic surgery requires consideration of many
factors. One is measurement of your BMI (body mass index equals weight in kg /
square of height in meters). You can find BMI calculators on the internet. If
your BMI is > 30, the cosmetic result will not be optimal. If your BMI is
> 35, your operative risk will rise. From your height and weight data, your BMI is 33.47, in the "obese" category. Weight loss through diet and exercise
is recommended.  Your "normal" weight of 167 would represent a BMI of 30.54, a better option.
Of importance, it is not worth starving yourself to achieve a
"satisfactory" preoperative weight, as you most likely won't be able
to maintain it. You should be at a comfortable maintainable body weight (i.e. 6
months or more). 
Visit
a board certified plastic surgeon for evaluation and discussion.
Best wishes...

Thank you for your question. It is hard to provided with a valid medical opinion without photos.  I would suggest to be treated by board certificated plastic surgeon with experience in this procedure, to get the best desired results.
Kind Regards,Dr. Emmanuel Mallol Cotes.-