Converting to WordPress Site – Keywords/Page names

Hello. We have had our site for several years (www.westcoastmotorsport.net) and it is ranked pretty high in google for certain keywords.

We just bought a wordpress template from themeforest. You can view the template here: http://themeforest.net/item/community-innovation/full_screen_preview/101572.

I am going to install wordpress on our site today, and I found a handy guide explaining how to do convert the site to wordpress once it’s done. (http://www.cybercoded.net/convert-static-html-site-to-wordpress-easily/)

My question is, will I be able to keep all of our page names the exact same, and will this process (explained on cybercoded site) affect our google rankings? Web searches are our main source of business, and I can’t afford to mess this up.

Many Thanks for your help.