Ok since I have had the car the stereo worksone day then not the next, so while waiting to see if I m rebuilding the transducer now (90degrees) or waiting for the fall I decided to tackle the radio.

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  Ok cancel the warning. My stereo is back and running as planned. Found the problem as the colors were mixed up yellow/orange and the orange wires for the acc and the pwr to antenna were somehow cut and taped together but no bare wire extended so no contact..... Just ready to quit for the day on the project but now all is well.  I know someone else was having stereo problems but really just 3 wires are usually the issue.

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I am planning on installling a new stereo system in my 78, leaving the factory radio in place. The current challenge is mounting new 6x9 speakers in the back, replacing the "dummy" panels.

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Joe T

It seems that the dummy panels but found that the newer 6/9 speakers usually have a larger cone/magnet that will not fit. The original are smaller and fit into the opening/depth that the 78 has. I did get them in but not attached to the mounting frame as they were too big. But they do fit behind the speaker mounting bracket and with the car installed you cannot tell.  Good Luck! BB78

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Hi BB78, Thanks for the reply! I just checked and yes you are correct about the aftermarket 6x9 magnet and basket being too big for the factory opening. I was given the speakers as a gift so to use them in the back it looks like I will go with small speaker boxes. My plan is to use a 2-channel power amp and a portable player (ipod or mp3) directly into the amp. The factory radio will still be playable thru the front 4x6 dash speakers.

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Joe T

Hey guys, if you use 5X7 speakers in the back they will fit flush. Thats what I did! Used Boston Acoustics units. Sound pretty good!

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"Down on the Boardwalk...

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Hi Barry, thanks for the reply!  This 78 Vette did not have rear speakers, so now my plan is to use a board across the back with cutouts for the 6x9's, and to mount the amp between them.   Joe

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Joe T

That will work! Mine had the factory speakers so I wanted to keep it looking original.

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"Down on the Boardwalk...

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I got my 6/9 to fit but not flush with the speaker grill but still work ok and unable to see it with the carpet grill on. But now it sounds like I need to get me some of those Boston Acoustic's, wow always something to spend the money on! (like a radiator support?) Nice color Jaws 79

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Thanks, right back at you!

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"Down on the Boardwalk...

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I replaced the factory dash speakers in my '78 with Boston Acoustics 4x6, which fit perfectly. These speakers have a flush tweeter and a low mounting height compared with most other 4x6's. Adam Wartell2010-10-06 11:35:39

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Joe T