I know that in NDRA you would be considered "two power adders"...I know I know...Kind of goofy but alky injection is considered a power adder...i.e., you want to run in a "Super Stock" class with cars say 11.99 and slower, you wouldn't be able to because they are limited to one power adder; turbo or nitrous or supercharger. You would then be in a ridiculous class like "Turbo 4" class or something that allows two power adders...Turbo/N2O...Turbo/Meth...Etc... I dunno. That is for NDRA. For NHRA, I am sure things will be similar.
www.nhrasportcompact.com should yield something. Good luck.
Kris