Assuming there is something along the lines of race modding cars in GT5, there should be the abillity to take a chasis and build your own race around it. To keep it all manufactuer safe they would have to be from the same parent company. It would be awesome though to create my dream GM or dream BMW. Many combinations possible but would allow the race cars to feel a lot more personalized than just this is MY GT500 supra with my graphics. With that said I'd like to know what other people would see as their "dream" combo for racing? M3 Chasis with a M5 Engine? Chevy Cobalt with a LS7? Just somethings I thought would be entertaining. I was always sad that I never did the hybrids in GT3.