i am partial to the edelbrock tvs/roots supercharger for these personally. i have built up most everything around the car expecting to add power last. with it and e85 it will easily hit/be over 300 whp.
i thought i'd do it next year although i'm thinking now i'll just keep it n/a and work on driver skill to shave some seconds off, because i'm sure the gap there is still huge. sure is tempting though!
even though it is a short track, and that amount of seconds isn't nothing, i was expecting the full out car to have a larger gap.