I have installed Custom Auto Sound 6 by 9 dual voice coil speaker in my 54 originakl location, fits perfect and sound is great. I have the stock AM radio, but installed secret audio below seat as well as built an 8 inch kicker sub woofer with 200 watt MTX amp. Installed real nice 4 by 10s in the doors and located the remote head in the glove box. System kicks butt and it looks stock.