Thanks for the suggestion. I went with a 6x9 Infinity 2-way, which did dramatically improve the sound. It was not easy to mount, however, primarily due to the location of the top right screw hole. No room for your fingers... Anyway, if anyone is doing an upgrade, Crutchfield has a good deal on these speakers, and also provided the wiring harness connectors. '91 Riviera adapters worked fine. Since the speakers were on sale (50% off the 2nd pair), I also installed a set in my Dad's '97 Riviera which yielded similar results, without the bruised knuckles. Thanks again.