up firing port in cab

i was looking at my mustang today and the only way i can put a fifteen in it is to up fire it in the trunk. but i was thinking about up firing in the trunk and having the port come forward into the cabin. would i lose any efficiency in doing this as compared to having both sub and port towards the cab? also if i do a blow through and up fire a sub in the bed and have just the port coming through the cab would it be quieter than having both sub and port?Oh Man Theres Troy

i say up fire and port toward the back, sub next to the rear seats. you might have cancellation problems if the port is facing the cab with the sub up.git yer swerve on!