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Originally Posted by roger1

Have you test fit the front speakers yet? If your '70 is the same at the dash as my '69, I think you may have a duct clearance issue like I did. My understanding from talking to Miguel at Classic Car Stereos is that they buy the mount from Custom Auto Sound and they have Custom Auto Sound speakers installed. Then Classic removes those and installs better speakers like the JL Audio you chose and the Kicker that I chose. However, the speaker change can affect the fit in the application Custom Auto Sound designed them for.
Anyhow I hope yours fit OK and you don't have to send them back.
Same question to you too. Are you going with an amp? If so I would think in your case you would go with a 4 channel to power all 4 speakers.

CCS said that using the JL Audio I linked to with AC bracket would clear the ducting. I'll have to check with the shop to see if it has been installed yet and if there were any issues. Hope not...after CCS' affirmation and all the research I did...but you know how that goes.

Same plan as ZeGermanHam...no amp initially, unless needed and probably just to push the 6x9s. Honestly...I imagine listening almost exclusively to the 400.