6th Order Band Pass in Spare Tire Well, 2001 Ford F-150

I have 2001 F150 SuperCrew. Currently I have a 12" in a .78 cuft sealed box. But I want to use a different 12 in a band pass box where my spare tire rides, and run a port from the box under the bed to just behind the rear seat.
There are several reason I want to do this, mostly it's cabin space restrictions.
So from the front of the box to where it would enter the cab is roughly 4 feet. Can I run a large port to keep the tuning around 30Hz? Maybe two 3" ports?

FS(Hz)     23.32
VAS(l.)     99.97
QTS     0.44
QMS     10.28
QES     0.46
BL(Tm)     16.9
CMS(mm/N)     0.208
RMS(kg/s)     3.193
LE(mH)     3.05
MMS(gr)     224
VD(l.)     0.751
SD(mm.2)     53100
X-Max(mm.)     14.15
X-Mech(mm.)     0
RE(Ohm)     4

General specifications
Max power(W.)     1400
RMS power(W.)     350
Number of coils     1
Impedance Z-Nom(Ohm)     4
Reference efficiency η0(%)     0.27
Sensitivity(dB) 1-W     86.2
Sensitivity(dB) 2.8-V     89.2
Mounting information
Speaker displacement(l.)     0
Total diameter(mm.)     310
Cutout diameter(mm.)     276.1
Mounting depth(mm.)     165.1