Amazing photos you've quoted saladine !
Is bad design that you would need to load a private race to figure out what cars you can use.. the game should provide that info, or load the buy cars screen with all the cars that match the requirements. In fact it should be possible to do that even if you have a car in the garage that fits it, just load a screen with this are the cars you have that fit or you can buy one of thse.
edit: Loop is a great driver from the looks of that vid, also that car sounds amazing
It's still not ideal but in the dealership, you can somewhat do the same. If you go to the search, you can manually filter the Asian manufacturers, then if you hit X, you can scroll through the specs of the cars. Once you've hit the "car type" spec, just hit X again to sort the results. You now have the "pre-tuned car lined up in PI order in the middle of your list.
Ideally, they would just have added all the specs (car type, engine type, aspiration, year/years bracket, etc...) to the search filters, it would have been so much more simple.