go here....
http://boatsbikesboards.wordpress.com/2008/It's in different posts. Basically, look for any of the pics with boats in it. It's a blog, so you have to go through other posts to see the info you want.
However, you can probably look at the Capricorn tuning manual?
http://www.ahpc.com.au/B_TechnicalSupport.htm At least get an idea anyway, since the Viper is basically the same boat with two feet cut off of it.
Mike