hi, there are no items specific to the GTT conversion that need replacing. At 60K a few things should be done, if done completed recently. ..brake fluid change, coolant change etc. The sparkplugs in the GTT conversion should last longer than the stock ones, even so I would change these every say 30K to ensure optimum spark. Belt change likewise but every 12K miles. Use a good fully synthetic oil to.
Best Regards Roland GTT