This is just a quick box i made this afternoon to fit behind the seats of a mid 90's single cab Chevy 1500. The box is 2.0 cubes with 25 sq in of port tuned to 32 hz. It will be powered with about 750 watts, so we'll see if he needs a bigger amp or not, but this should be a pretty efficient box for his needs. "Terminals" are 2 5/16" bolts through the wood. Needed to have the spacer ring to get more mounting depth for the sub to fit. Here's a couple of pictures of it finished.