Custom auto sound has a replacement dash stereo speaker for the dash. They have one for an AC and a Non-Ac car. I put one in my wife's 69 vert and added the kickpanel speakers as well. I put the 1 inch tweeters in the winshield post and I get plenty of cruisin' sound out of it. Even at highway speeds with the top down. Key point is to replace the dash speaker to optimize the volume and not overdrive your system or the other speakers.