In the Old Daze, like 1950's, they actually had a nitro class for everything. I saw an old photo of Jack Chrisman, Ford sedan (1932?) & the class was A/Fuel, the opposite of A/Gas. This was mid 1950's. Deagsters, Modified Roadsters, Competition Coupes & Sedans, Roadsters, Altereds, etc etc, all had versions of nitro classes. Sometimes the nitro cars were called "hot" cars and you had the "hot pits" as well. San Fernando had a hot pit area (anything that had to be push started). I used to love watching JR/F at Lions. Nice cackle outta the pipes & they put on a good show.