Here's what I did with my '67 coupe, I had a custom box built to fit two tweeters, and two 6 inch speakers, and sat it right between the two front seats, Two 6x9's in the rear panel, and two 10's Mounted behind the rear seat in this box:
Mustang Speakers <-- Scroll down to the bottom, in the "Backseat Driver" section, I have one of those but replaced the speakers. But this is what I've got
"Pitbull" 6 inch and tweeters
Pioneer 250 watt 6x9's
JL Audio 500 Watt 10's
Planet Audio 400 watt Amp powering the 10's.
It sounds great, not too much bass like all them low riders ya see around, but still something good
