if I'm not mistaken, F.A.S.T. allows:

cars with 14" tires to run a MAX of G70-14s,
cars with 15" tires to run a MAX of G60-15s,

& I don't think they are picky on some cars running 15s
that were not a factory available option?

& it's all in fun until you become a top competitor!

What/who has been the fastest F.A.S.T. legal small-block E.T. & MPH?