I have a garage sale special in my '04 Vibe right now. The amp I have is an old Alpine 3527 rated at 25 x 4 RMS. I have it bridged to Bose sub box that's from a home audio system. $10 at a garage sale. It takes up nearly no room (6" x 15" footprint) and sounds just fine. DSM series? I have two of those. One Punch 100 and a 200. I bought the Punch 100 brand new in 1992 for ~$400. The 200 I picked up off an online auction site about 2 yrs ago for ~ $150. All my friends thought I was crazy paying that for a used amp until they heard it in my wife's old MX6 pushing to 12" Kicker Comps Best damn amps ever made IMO. Those two amps will probably end up in the '71. Should help loosen all the rust.