Hmmm, ok, thanks. I just took a wild guess while waiting for answers and took and inch off my port length to see. I got a 35.5hz tuning. I could probably live with that. I cant go any longer or else i will be too close to the back of the box.
My only other option is to go out the sides of the box, but that would put the ports in the front right under the subs. i don't know how that will work or sound.
also, Is my port area good enough? it's 12.5 in^2 at 10.5" length.
Thanks again everyone.