Product Description
Custom Autosound 1966-67 Buick Riviera USA-740 In Dash AM/FM
The Custom Autosound USA-740, offered by Vintage Car Radio, is the ultimate audio upgrade for your 1966-67 Buick Riviera. Known for its sleek lines and luxurious performance, the Riviera deserves a sound system that combines cutting-edge technology with classic styling. The USA-740 delivers just that, preserving your car’s vintage charm while offering modern audio capabilities.
Designed specifically for classic vehicles, the USA-740 fits seamlessly into the factory dash of your Buick Riviera without requiring any modifications. Its retro appearance, complete with authentic-style knobs and faceplate, ensures it complements your Riviera’s interior while enhancing functionality.
The USA-740 packs an impressive 300 watts of power, ensuring your favorite tunes sound vibrant and dynamic. With an AM/FM digital tuner and 30 station presets, you can effortlessly enjoy local radio stations. Its Bluetooth connectivity takes it to the next level, enabling wireless music streaming from your smartphone and hands-free phone calls for added convenience and safety.
For those who prefer a variety of music sources, the USA-740 includes a USB port and auxiliary input, letting you connect flash drives, MP3 players, or other audio devices. It’s also compatible with an optional CD changer, perfect for classic music collections. The RDS (Radio Data System) feature displays station and track information, adding a modern touch to your listening experience.
Sound customization is made easy with adjustable bass, treble, balance, and fader controls, ensuring your music is tailored to your taste. Its dual RCA pre-outs and subwoofer output allow for easy integration with additional speakers and amplifiers, delivering a concert-like experience in your classic car.
Enhance the driving experience of your 1966-67 Buick Riviera with the Custom Autosound USA-740, available exclusively at Vintage Car Radio. Combining vintage style with modern tech, it’s the perfect addition to your timeless ride.
Custom Autosound USA-740 Classic Car Radio With Bluetooth USA-740 Radio with Bluetooth Features:
- AM/FM Radio Bluetooth, USB & Auxiliary Inputs
- Option to Add CD-1, Single CD Player
- Bluetooth is Built Into the Radio
- Fits in your Original Dash Opening Without Cutting
- 3.5mm Aux Input on Front of Radio
- RCA Aux Input On Back
- Change Display Lettering Color
- Digital Tuner
- RDS Song/Artist Information
- 5 Channel RCA Pre-Outs w/ Subwoofer Control
- Separate Bass & Treble Control
- 5 EQ Presets
- Fader and Balance Control
- 15 FM & 10 AM Pre Sets
- Seek/Scan Function
- Back by a 2 Year Warranty from the Manufacturer
1966-67 Buick Riviera USA-740 In Dash AM/FM: Your Questions Answered
Do I need to modify the 1966-67 Buick Riviera dash to install it?
This listing is the version made for the 1966-67 Buick Riviera, designed to go into the original dash opening. Custom Autosound says its radios fit without altering or cutting the original dash.
What if my 1966-67 Buick Riviera has air conditioning?
The Factory Air option tells us which dash layout your 1966-67 Buick Riviera has, so pick Yes if it has factory A/C.
Can I add a CD player or Bluetooth?
Check the CD options on this page, which include Single Slave CD.
Does it look like the original radio?
The 1966-67 Buick Riviera USA-740 In Dash AM/FM is styled to look like the factory radio, so your dash keeps its period appearance.
How does the USA-740 handle phone audio and connections?
Bluetooth is built in, with a microphone included, so you can stream music and answer calls. You can pick from multiple LCD colors to match your gauges, with a dimmer, and it fully controls the optional CD-1 player.
Which add-ons are offered with this radio?
The options on this page let you add a front dual voice coil speaker, a rear 6x9 speaker pair (Custom Autosound 6x9 Speaker Pair and Upgraded Pioneer Speaker Pair), and an antenna (Hideaway Antenna and Power Antenna).
USA-740 specifications
- Bluetooth built in (streaming and hands-free calling)
- 300 watts peak power (45W x 4 RMS, 2-ohm stable)
- AM/FM stereo tuner
- 2 AUX inputs (3.5 mm front and RCA rear)
- USB port
- Direct control for optional CD-1
- 5-channel RCA pre-outs including subwoofer pre-out and control
- 15 FM and 10 AM presets
- 7-color LCD with dimmer; RDS station/song/artist display
- DSP EQ; auto-store presets
- Electronic tuning and volume; separate bass/treble; 4-way fader; L/R balance
- Power antenna lead; digital clock
- USA/EUR/JAP/RUS tuner capability (USA default)
- Custom Autosound 2-year manufacturer warranty
USA-740 wiring and tech tips
Use this as a head-unit reference for power, ground, antenna, speakers, and amplifier connections. Always match the printed diagram that ships with your unit if it differs.
Power and ground (typical Custom Autosound harness)
| Function | Wire color |
|---|---|
| Ignition / ACC +12V | Red |
| Battery / constant +12V | Yellow |
| Ground | Black |
| Power antenna | Blue |
Ignition and power-antenna leads are commonly fused at 1A on the harness—confirm against the guide that ships with your radio.
Speaker wiring (typical)
| Speaker | Wire color |
|---|---|
| Left front + / − | White / White-Black |
| Right front + / − | Gray / Gray-Black |
| Left rear + / − | Green / Green-Black |
| Right rear + / − | Violet (or Purple) / Violet-Black |
USA-740 extras
Expect antenna, USB, microphone (Bluetooth), CD-1, and subwoofer RCA connections in addition to front/rear line outs. Use the front 3.5 mm AUX or rear RCA AUX for wired sources.
Suggested order for a 1966-1967 Riviera
- Disconnect the vehicle battery before any wiring.
- Connect ground first, then constant (yellow) and ignition (red).
- Connect the antenna plug and the blue power-antenna lead if your car has a power antenna.
- Wire all four speakers, matching polarity.
- If using an amplifier, run RCA cables from the front/rear (and sub on USA-740/USA-850) pre-outs.
- Reconnect the battery and test radio, speakers, and charging system voltage.
Tech tips for 1966-1967 Riviera
- This radio is sold for the factory Riviera opening used in 1966-1967 models—do not cut a modern DIN rectangle if you want a stock look.
- A poor ground is the most common cause of whine or weak audio; scrape paint at the ground point and use a star washer.
- If AM reception is weak, check the antenna mast, cable continuity, and that the antenna plug is fully seated.
- Vintage Car Radio does not install radios. If you are not comfortable with 12V wiring, use a qualified installer.
USA-740 manuals
Download the manufacturer guide for operation, safety, and the official wiring diagram. You can also browse our full library on the Manuals page.
Vintage Car Radio does not offer installation. The manuals are for do-it-yourself reference or to share with your installer.
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
FAQ — 1966-1967 Riviera USA-740
Will this fit my 1966-1967 Riviera without cutting the dash?
It is built for the original radio opening used on 1966-1967 Riviera models. Compare your dash opening and bezel to the product photos. We do not modify dashes in-house.
Does this radio have Bluetooth?
Yes—Bluetooth is built into the USA-740 for streaming and hands-free calling.
Do I need an amplifier?
Many owners run speakers directly from the radio. Pre-outs are there if you want more volume or a subwoofer later.
Do you install the radio?
No. Vintage Car Radio ships the unit and documentation; installation is DIY or by a shop you choose.
What is the warranty?
Custom Autosound radios include a 2-year manufacturer warranty. See the Warranty section for details.
Need help?
Call 844-802-4499 or 574-226-6676.
Specs
Wiring / Tech Tips
Manuals
Warranty
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
