I have a 89 Mustang and I am interested in going turbo. I have been looking at the On3 and the BG kits. My biggest concern is how hard is it to get everyhting to fit. I have a GT convertible that is in very nice condition. If I am going to have to start cutting sections out of my front bumper cover to get the intercooler to fit, or using a hammer to modify shock towers and firewalls I will probably just stick with the same old supercharger route that most take. I like the idea of turbo and that its different than what most are using. If you guys could give me an idea of how these kits fit and what problem you have had while installing the I would appreciate it. I am new to the whole turbo thing but have had superchargers in the past. Thanks in advance!