Normally the CF hood would put you into street mod, as would changing the intake manifold. When you say "rebuilt" b18b, do you mean stock or did you change anything, such as cams, pistons, compression ratio? All or any one of these will put you in street mod.
best thing to do is just go and get involved, race! Do not worry about how fast or slow you are. Most of us were SLOW, very slow when we started out. So go and have FUN!
Art 
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Still learning how to drive .....getting better....
