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  • Is it a Real SS?

    This page is to provide information about the 1970 and 1971 Monte Carlo SS454.

    The 1970 Monte Carlo brochure reads as follows for the SS454 model:
    Monte Carlo SS454 includes a 360-hp Turbo-Jet 454 V8, Automatic Level Control, G70 x 15 wide-oval white stripe tires with 7”-wide rim wheels, heavy duty chassis components and SS exterior identification.


    Exterior Identification

    The Monte Carlo SS454 was only made in 1970 and 1971.  The 1970 SS could be distinguished from a non-SS Monte Carlo by the emblems on the lower fenders of each side.

    ss_emblem2.JPG (17777 bytes)

    In 1971 the SS added additional markings on the rear of the car.  This included having the "BY CHEVROLET" tag replaced by "SS", chrome strips added to the top of the rear panel below the trunk, the rear panel painted black and a rubber bumper pad.


    These emblems are the only way to tell an SS Monte Carlo from the outside. 


    U.S. Built Cars
    The best way to check to see if a car is a real SS is the build sheet.  The build sheet will have the Z20 Monte Carlo SS option code listed.  There is no indication of the SS option in the VIN or cowl tag on U.S. built Monte Carlos. If the car was originally sold in Canada then you can get the information package from Vintage Vehicle Services that lists out the options for the car.

    buildsht.JPG (12557 bytes)

    Canadian Built Cars
    Canadian built 1970 and 1971 SS454 Monte Carlos will have the Z20 code stamped on the cowl tag. The cars built in Canada did not have full build sheet like the U.S. cars had, they may have a line sheet which is a much smaller paper slip that simply has the 3 digit option codes with no descriptions. Since it was built in Canada you can get the information package from Vintage Vehicle Services that lists out the options for the car.

    All SS Monte Carlos in 1970 and 1971 were 454s and all 454s in 1970 and 1971 were SS cars.  So if there is a numbers matching 454 in the car, that is a good indication it is a real SS.  The VIN should match the serial number on the engine.  The engine serial number is usually found on the machined surface of the block just forward of the right cylinder head.  It may also be found on a pad on hte side of the block near the oil filter.  The serial number will start with "CRN" for 1970 and "CPD" for 1971.

    All SS454 Monte Carlos Have:

    1. Automatic Level Control

    G67 - Automatic Level Control – compressor under the hood, leveling valve mounted on rear, air shocks and air shock protector plates on rear.

    The compressor is mounted on the inside of the left inner fender. 

    compressor.jpg (17108 bytes)

    The leveling valve in mounted on the body and attaches to the left rear end upper control arm.

    SS Leveling valve

    The shock protector plates are bolted to the rear just inboard of the lower shock mounts.

    shock_plates.jpg (15297 bytes)

    Also look for the black plastic air line along the left frame rail.  The line was held in place with clips on the brake lines.

    2. Rims and Wheel Covers

    In 1970 the PH1 - 15" x 7" rims with wheel covers were standard with the SS454 package. Other wheel covers and rally wheels were optional. In 1971 the ZJ7 - 7" x 15" Rally wheels were part of the SS454 package. 1970 SS454 pictured below with the wheel covers.

    PattonsSS.JPG (16902 bytes)

    3. 454 Engine

    LS5 - 454 V8. 360hp in 1970 and 365hp in 1971
    (no proof of the LS-6 450 hp cars – but we’re always hoping a documented one surfaces…)
    1970 LS5 454 engine pictured below

    ss_engine2a.JPG (29112 bytes)

    4. Turbo Hydromatic 400 Transmission

    M40 - TH400 automatic transmission

    5. White Stripe Tires

    P90 - G70 x 15 white stripe tires

    6. Heavy Duty Battery

    T60 - HD battery

    7. Front and Rear Sway Bars

    F41 - Front and Rear anti-sway bars - the front sway bar is 1-1/8" diameter (standard is         15/16" diameter). There is also a plate welded to the bottom of the rear control arms ("boxed"  control arms).

    8. Dual Exhaust

    N10 - dual exhaust with chrome tips (same tips as SS Chevelle)

    No SS454 Monte Carlos Have:

    1. Fender Skirts

    T58 - fender skirts (due to the 7” wide rims)

    2. Manual Transmission

    M20 – 4 speed transmission – (no proof yet of any in existence, show us your build sheet)

    3. LS6 Engine

    LS6- 450 hp 454 – please prove me wrong, until then…

    4. Convertible Top

    Convertible roof – again, no documented proof, lots of tales though…

    An SS May Have:

    1. Rally Wheels

    ZJ7 - Rally Wheels  - 7” x 15” (again, standard in '71, optional in '70)

    2. Center Console

    D55 - console is not part of the SS454 package. If the console is present it should have the burlwood top that matches the dash.

    3. Bucket Seats

    A51 - Bucket seats was not part of SS454 package. Many SS454 cars were built with the standard bench seat.

    4. Positraction Rear End

    G80 - 12 bolt posi-traction rear end. 2.56 was the standard ratio for the 70 SS and the 3.31 was the standard ratio for the 71.

    5. Special Gauge Package

    U14 - Gauge package was not part of the SS454 package. Some SS cars may have the standard warning lights instead.

    6. Power Steering

    N40 - Power steering - not all SS cars had it.

    This page is maintained by Aaron Dodsworth.  If you have any information, comments or questions, please contact Aaron at dodsyaaron@gmail.com

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