I solved that problem but I was still building the car and the dash was out of the car. I used small wood screws to attach some thin aluminum angle on either side of the radio hole and then pop riveted the mount to those angles. This was handy because I didn't trust the little tabs and I was installing the chassis (sorry, I'm getting turned around with nomenclature) for my Pioneer pull out radio. My JVC has a similar mounting arrangement in that a chassis is attached to the dash and it holds the radio. Looking at a picture of a radio like Joe has on Ebay, it appears that it shares that mounting system. It was difficult, but I was able to "un-rivet" the old chassis for the pull out radio and pop rivet the new chassis for the JVC radio. Unfortunately, doing that on a dash installed in the car would be VERY challenging!!! But I think it might be possible if you can get away without drilling a pilot hole and you have a good offset ratcheting screwdriver.