The 2019 rules have been posted online!
Changes for 2019 include a reflection of the CCR which raised the size of the car number to 12" high. (This was put in place so corner workers and timing and scoring can see the numbers easier. at some tracks.) I recommend you make them even bigger, its a race car!
The radiator catch tank requirement was removed from one section and accurately located in the cooling system section.
Blowby gasses catch tank rule clarified.
The little hole most everyone drills into the WOT switch housing for oil drainage was added.
Sunroof cover panel material was defined.
Thats it for 2019!