Stuartt, Read the following about gearing:
http://www.clubcobra.com/forums/show...309#post730309
It was written prior to the release of the TKO 500/TKO 600 but first you have to get your head around the gearing. ie. the relationship between 1st and 5th gear,
your tyre size, and your diff ratio.
Also as the above site mentions, you will have to make a decision to gear for the track or the street.
Hope that helps.