Brushless Cen Genesis

[93firebird]

Well my work may not be as neat and clean as everyone else but here are some pics of what I have so far. I plan on keeping the stock tranny for now. Does anyone have any suggestions on a gear selection for this setup. I am planning on using a mmm with the neu 2200kv motor running off of a 4s 4000mah battery. I have seen the two speed adapter in the rc-monster store site, but I think that it is set up backwards for this application. Should I just order the gears that fit it opposite for what they are listed as, and are the gears that fit it the proper pitch? I am looking to achieve about 35-45 mph.