I have a friend with a 1985 Regular Cab 1/2 ton pickup (all restored) that's looking to put a system in his truck. I told him 2 RE SE would be a good choice, but I'm not sure how big this sub is depth wise. With this body style, Chevy didn't give you much room behind the seat.
Any idea on what sub/amp? He's wants enough bass to feel and that's about it. No budget has really been set, he's used to having crap systems, and he turned to me to get him something that'll last awhile and sound great.