How to Install a Modern Sound System on a 1967 Chevrolet Chevelle SS

Modern Sounds For Classic Chevys

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15. Next, use a rear speaker to cut a cardboard template, which you’ll need to cut out (and drill) the holes in the shelf.

Rear Shelf Speaker Outline 5/37

16. We found the best way to cut the shelf is from underneath, given the tight confines under the back window.

Rear Shelf Cut Speaker Hole 6/37

17. When you get about halfway through your cut, you’ll need to clamp the metal that’s being cut so it doesn’t wiggle while you’re finishing the cut—and possibly break your saw blade.

Speaker Grill Markings 7/37
Attach Speakers Trial Fit 8/37

18. Next, using your speaker grille, mark holes for the mounting screws and drill them. We drilled ours from underneath, with the speaker held in place, thanks to the lack of room between the shelf and rear window. Attach the speakers using the mounting screws provided for a trial fit.

Cut Shelf Top 9/37

19. Now it’s time to cut the shelf top for the speakers and their grilles. Remove the speakers and then put the shelf top in place. From underneath, trace along the speaker holes.

Cut Foam Speakers 10/37

20. Remove the shelf top and put it on your workbench upside down so the speaker-hole tracings appear. Make your first cut through the foam underside along the marked cuts, leaving the board in the middle—and the vinyl on the top—untouched for now. Next, clean up the cut you made through the foam layer.

Drill Pilot Hole 11/37
Drill Attaching Screw Holes 12/37

21. Drill a pilot hole in the center of the hole and use that hole to cut the board and vinyl with your pneumatic saw. Once that hole is complete, clean up the edges and reinstall the shelf top on the shelf. Using your template, drill the attaching-screw holes through the shelf top.

Attach Speakers Grilles 13/37

22. With all holes drilled and cleaned up, attach the speakers and grilles using the supplied hardware, per Custom Autosound’s instructions.

Custom Autosound Head Unit Tweeters Installed 14/37
Custom Autosound Head Unit Tweeters Installed Original Look 15/37

23. Here’s the Custom Autosound system’s head unit and tweeters installed, looking more like original options than aftermarket add-ons.

Subwoofer Power Controller Ashtray 16/37

24. The subwoofer’s power controller went inside the factory ashtray.

Ss396 Trunk Subwoofer 17/37

25. There’s plenty of room in the SS396’s trunk for the subwoofer to breathe—and for it to create a killer bass line.

6x9 Speakers 18/37

26. The Custom Autosound 6x9s look like they went in on the assembly line, with a sound that Delco’s R&D engineers could only dream of back then!

Head unit: Custom Autosound USA 630 II: (fits the stock ’67 Chevelle dash without cutting)
AM/FM Stereo RDS tuner shows station/song/artist on LCD display
300 watts peak power
USB port for flash drive MP3/WMA playback
iPod dock and control (control your iPod from the buttons on the radio)
Direct 6 CD changer control
Negative LCD display (black background with white letters/numbers)—display looks like an old-school analog radio, until you turn it on
Alphanumeric display for MP3/WMA/iPod files
Electronic tuning and volume control
Loudness compensation
Digital EQ
Four-way fader
Left/right balance
Digital clock
Two-channel RCA auxiliary input for satellite radio services, etc. (cable included)
12 presets (12 FM, 4 AM) with large, factory-style pushbuttons
Four-channel RCA preouts
Separate bass and treble
USA/Euro tuner
Power antenna lead
Manufacturer’s suggested list price (MSRP) for USA 630 II: $239
Front tweeters/subwoofer: Custom Autosound System 1 (Subwoofer and two tweeters)
Flat active aluminum subwoofer enclosure with 8-inch woofer, plus two-channel amplifier
Two 3-inch mid-tweeter/satellite speakers in die-cast metal housings (styled to look like ’67 Chevelle OEM underdash A/C outlets)
Remote bass level control
Amplifier installation kit included
Amplifier power: 150 watt subwoofer/2x50 watt mid/tweeter
Can be hooked up to any radio with speaker level or RCA inputs
MSRP for system 1: $299
Front tweeters/subwoofer: Custom Autosound System 1 (Subwoofer and two tweeters)
Kick panel speakers: Custom Autosound CAM 4X6 80 watt speakers
Factory-replacement kick panels with integrated 4x6-inch speakers that can handle 80 watts MSRP: $119/pair
Rear deck speakers: Custom Autosound CAM-693C 6x9 speakers
200-watt three-way 6x9 speakers
With factory-style flat metal grilles to maintain the original look
MSRP: $79/pair

Amd Logo 19/37
Service Performed In Tech Center 20/37


Custom Autosound
Fullerton, CA 92833




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