angrytrucker - 30" would still fit, but I would only have about 2" between the port and rear hatch which is no where near enough space, thanks for catching that though and making me re measure everything.
I'm going to go with these measurements:
37W x 18H x 26D
Port Dimensions:
16.5"H x 5.5"W
Port Length:
29"
Tuning:
32hz