[reinaldo]

I used to have an 87 Nissan . Same exact thing except for trim items and such. At first I had it firing up, port on passenger side. Then I added 3.5 inch legs, (I think 3.5, its been awhile), and down fired it port still on passenger side. I prefered down firing, the bass had more impact and I had a place to throw crap on top of the box. One thing I should have done was tune the truck box a bit higher, lots of lower (25-30), bass and lacking in upper bass, (40-60 Hz. I would avoid making the leg of the box part of the port wall, it may mess with tuning.

Here are a few pictures i've taken...

Truck box

 

[APLPIX]

Thats an excellent box! I'm getting inspired to build my own now lol. Always wanted to do a spare tire well box.