i've been approached to help out a brass band play the song Zoot Suit Riot (Yeah, my first gig!!!

) The song is pretty simple, but its a challange because i'm not very familliar with sheet music, but i can figure that out. The problem is swing. The song is supposed to be played with a "bright swing" and I need some clarification as to what that means. Next to "bright swing", it shows two eighth notes becomes a quarter and an eighth with a three over top. I understand the basic concept of swing rhythm, what i need to know is whether the swing rhythm in this case applies only to eighth notes, or if it applies also to quarter notes....also, what does the 3 over the eighth notes mean?
Thanks for the help