Well are those the paramaters from kickers website? For final reccomendations, make the box as big as possible, at least 6ft each, get at least 125 inches of port area, and when you think youve braced it enough, add twice as much bracing. Tune from 32-36hz. Use a 7/64th drill bit, and 1 5/8 screws. Keep the screws away from corners a little, to reduce the risk of splitting.