port for 12 Q

[wrldzmyn 0]

After speaker displacement I have 2.46 cu ft, I need to figure the port for tuning to 32 hz (recommended by Fi) I was looking at about 28 sq in of port, how long would the port be ? Do I need more port area ? If so what would recommend ? My enclosure is 43w x 14h x 7.5d(combination of top and bottom divided x 2).

Thank you for all your help.