B,
First good luck to you!! I wish ya the best at the show.
The question your asking is mighty complex without knowing quite a bit about your taget wieght for competition day, what your current diet is, etc, etc. I probably have as much chance of getting it right as if you asked me to do a Laplace transform after being outta school for 25 years or so.
I have an idea though you might be able to still do a Laplace
When dieting I like the approach of more scientific / common sense guys like Layne Norton, Mike Katz, etc so see if this link has any helpful ideas.
Dispelling the Myths: A Logical Approach to Contest Preparation
Again good luck bro.