emjay
+1y
I know that this is kind of an older thread, but currently I am building a single box for my 87 B2200 with a bench seat. I am building 2 6x9 boxes to sit in the corners and a single 8" sub to sit on the transmission tunnel. The face for the 8" box is actually 14" square, 4" deep at the top and 6" at the base. I would imagine that I could fit a 10" sub in the same box with a larger hole.
While I do know that the dimensions for our two trucks are not going to be the same, I would imagine that they would be similar.
Do note, that with a standard cab and a bench seat, you won't be able to crank the sub up high without the risk of damaging it.