Basically I have two cars. They're all apart right now (read bare shells). One is an s5 and the other is an s4 with no sunroof. Both need body repair, but the s5 is a bit worse. I have the facilities to do all the repairs and put the two cars together, but I only have a valid VIN for one car. I'm thinking of making one a street car and go racing with the other(I'm not sure which discipline). Which chassis should I pick for which purpose?

 

Non sunroof car for a track car for sure. Don't want that weight up high and don't want to have to go through the effort of closing up the hole, besides, sunroofs are nice on street cars.