Custom Crt.5 Project

[mambarustler]

Hey, I bought a crt.5 off ebay last week. I am going to be making a 15" long chassis for it. My setup will be medusa 3300kv 5mm shaft motor, MM esc, 3pm 2.4ghz, hitec 5625mg servo, and a zippy-k 4300mah 3s lipo. One of my question is what pinions should i get i know i need mod1 but am not shure how many teeth i was looking to get 50-65mph out of it. My second question is that am going be using a 1/8" thick 7075-T6 aluminum for the chassis and i would like to know if braces are neccesarry. I will post some pics of the car once i get home and I will update as i go on, I wont be able to finish it so fast because am only 14 years old. So LMK what you guys think and Suggestions.