Aero port length for three sundown zv3 15"s,, please somebody help me

[MRLOVETHATBASS]

hello everybody im trying to calculate my aero port lengths for my three sundown zv3 15"s , from flare to flare. torres box calculator dosent give the flare portion added on. My box is 9.83 cubic ft net after dispacements. I want to use two 8" aero ports and be tuned around 34hz. i want to no how deep the aero tube and flare will be in the inside of the box. keep in mind my depth is 28" deep. please somebody help me