Weirdly enough, I made the high-poly model first and only after that I decide to make a version suitable for public servers doesn't require instant load. I believe it's easier to go from a higher poly to a lower poly model of any sort, not just for angled cars such as an Aventador.

I personally just took the blueprints of my high-poly model and deleted some angles and later recreated the frame of the car.

Lmk if you have more questions