Maybe you can add the possibility to put the radiator in the back of the car, so when you go race these cars the radiator wont be broken that often. It should be in the same place where the backseat normally is. Just a picture for the idea.
I found two problem. Appeard both on demolition scenerio and freeroam. The pink pessima doesn't have a radiator(coolant thrmostat 0.000) The old pessima configured FWD but have its rear diff welded.