00' Blazer, no back seats; sub placement?

[tequila]

Hi guys, might be a weird question but I'm trying to any eliminate issues preparing my build.

So I'm designing a box for my SA-12 v1 and was wondering what box and port placement would be best for a 2000 Chevrolet Blazer without any back seats.

Basically the truck is all cargo area behind the front seats. A wooden frame was built behind the seats and it's been carpeted too.

This leaves me room to put the enclosure anywhere I like. I have no restrictions but would like to have room left to put stuff so no crazy wall or 6 sub build ;-).
I'm just scared for weird cancellation or other sound issues given there's only cargo area and nothing surrounding the enclosure. I've never put any kind of subwoofer in this truck.

 

Should I be worried?

Where should I put the box and fire the ports? How far away from the latch?

 

 

Box would be 2cuft @ 31hz with 30sq² port area. Amp is set to 1000wrms at 1 ohm.

 

Thanks in advance and any suggestions are welcome!

 

Pic included of how it looks.