Jason
On the back of the NHRA application for NHRA license and competition number registration under the License regulations / general paragraph 8. it states "
Class 4 license runs can be completed at an eighth mile track.For class 1,2,or 3 license runs 1,2,3,4 can be completed at an eighth mile track but runs 5 &6 must be completed at a quarter mile track.
So If your not planning on going faster than 7.50 a class 4 license will suffice and you can get those license passes done at an 1/8 mile track.
Note the index for Super comp for eighth mile is 5.70.
You can down load the License and medical forms from you local NHRA divison web site.
(Damn it Carter beat me on reaction time!

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