Getting ready for Watkins Glen

I have 5 weeks before Watkins Glen (June 10-13). Right now the oil tank is the problem, I spent the weekend cleaning up oil on the back of the car. The catch can for the oil is fulling up at about 1/2 quart per race session. Another problem is I lost 3rd gear during the race, I guess it's time for some new dog rings, and still need the proper gear ratio for Watkins Glen.