Don't bother trying to do the upgrade its way to much hassle. Either stay with the car as is or go to the 966 and up. The Viper is sweet. I got into 8th at the 950. I have tires and parts for the 960 to keep you going for a season or two if you don't crash a lot. Lol. I'm in Vancouver so easy shipping might work. Let me know if your interested .
take a look at our track . Very cool
http://joshuasouthoaks.blogspot.com for blog, pictures and video of race events