Buick Super 56C & Roadmaster 70C, 75C & 76C, 1957-58
Convertible Top and Convertible Top Parts

Buick Super 56C & Roadmaster 70C, 75C & 76C Convertible Top Key Features:
  • Quality: Made to Buick specs, 100% fit guarantee.
  • Original Configuration: This is a classic two part convertible top: there is a main top and a rear window section. The two are integrated upon installation. We offer tops with plastic rear windows and with blank rear sections (for those with access to glass window and framework.) Tops come with the above rear window molding and their chrome tips. Extra material required for header bow is included.
                All seams are doubly electronically welded and sewn for added reinforcement. Convertible top fabrics are mildew & mold resistant, and UV treated for color fastness. Plastic windows are DOT rated heavy 40 gauge thick vinyl.        
  • Shop with confidence: 6 year manufacturer warranty.
  • Hydraulic Components: Hydraulic cylinders, motor pumps and hose sets all available and in stock.


Note: See description on installation at our guide book (at 'installation supplies')
 

Convertible Tops and Packages

Convertible Tops and Packages

A.) Haartz Pinpoint Vinyl Convertible Top with blank rear section.
Two Part Top Manual is included (if requested in checkout messag box.)
Color:

As low as:
$430.00
B.) Haartz Pinpoint Vinyl Convertible Top with plastic rear window.
Two Part Top Manual is included (request in checkout message.)
:

As low as:
$410.00
C.) Haartz Stayfast Canvas Convertible Top and Plastic Window
Two Part Top Manual Included (Request in checkout message box)
For: 1957-58 Buick Super 56C & Roadmaster 70C, 75C & 76C Convertible Top
Color
View Color
$630.00
D.) Haartz Stayfast Canvas Convertible Top with blank rear section
Two part top manual included (Request in checkout message box.)
For: 1957-58 Buick Super 56C & Roadmaster 70C, 75C & 76C Convertible Top
Color
View Color
$670.00
E.) SPECIAL ORDERS:
(Design your package, select other colors, etc.)
Please send an email request to support@mtmfg.com
For: 1957-58 Buick Super 56C & Roadmaster 70C, 75C & 76C Convertible Top
No Charge!
Buick Super 56C & Roadmaster 70C, 75C & 76C convertible tops and parts in this category fit model years: 1957 and 1958


Installation Supplies

Installation Supplies

New Edition!!!
Convertible Top Guys' "How To Remove and Install Classic Two-Part Tops."

This 40-page, extensively illustrated how-to manual walks you through removing and installing a two-part convertible top. The manual applies to almost all American convertibles made before the year 2004, and some foreign cars, too, like Celicas and Saabs. This is a bound 8 1/2 x 11 book; designed as both a tutorial for first-time installers and as a step-by-step manual for these convertible tops. Generally, all that is needed and not contained is the "bow height" which is the setting of the rear top frame bow for your convertible. This is available from any top distributor.

What skills are required ? (1) The ability to drive staples into bow frame tacking strips (2) The ability to orient fabric sections to the frame and apply with contact cement. (3) A systematic and careful personality ! (There is never any sewing required.)

Note: Very early cars (forties) had wood bows and installers will have to adjust processes for stapling to these bows instead of tacking strips in steel bows as described in manual.

   Details...

$30.95
75" PADS WITH QUARTER SECTIONS. TAN (FOR USE WITH TAN UNDERSIDE TOPS)
$89.95
Fiberboard Tack Strip, Measures: 1/4" Thick x 5/8" Wide x 62" Long

 

   Details...

$8.95
Fiberboard Tack Strip, Measures: 1/4" Thick x 13/16" Wide x 62" Long

 

   Details...

$10.95
Fiberboard Tack Strip, Measures: 1/4" Thick x 3/4" Wide x 62" Long

 

   Details...

$9.95
Fiberboard Tack Strip: 1/4" Thick x 7/16" Wide x 62" Long

 

   Details...

$7.95
Fiberboard Tack Strip: 1/4" Thick x 9/16" Wide x 62" Long

 

   Details...

$8.95
Front and Rear Top Frame Bow Tack Strips
   Details...

$19.95
Top Pad Set, includes Quarter Pads,

 

   Details...

$75.00
Top Pads with Quarters, Stayfast Canvas

 

   Details...

$169.95
A supply of front tacking strip which can be cut to size. this measures 5/8" WIDE X 3/16" THICK X 6 Foot
   Details...

$11.95
A supply of rear tacking strip which can be cut to size. this measures 1/4" THICK  X 1/2" WIDE X 6 Foot
   Details...

$11.95
Convertible Top Rear Well Liner, Original Black GM Material
   Details...

$99.95
Tack Strips: Front measures 5/8" X 3/16" cut to length by the foot
   Details...

$2.00
Tack Strips: Rear measures 1/2" X 1/4" cut to length by the foot
   Details...

$2.00
The Arrow T50ACD electric staple gun drives wire staples with force. It will securely drive 1/4" and 3/8" staples into modern convertible top tack strips, eliminating the need for an air gun for convertible top installation. This stapler comes with the a supply of 1/4" and 3/8" staples.

This stapler also has a brad driving capability, so you can use this stapler again and again for a variety of jobs.

The Arrow T50ACD packs a well-balanced powerful, durable design. Comes complete with 10-foot, heavy-duty cord, a supply of T50 series staples, and a one-year manufacturer's warranty.

The Arrow T50ACD stapler has a spiral driven mechanism for consistent powerful driving power. Additional features include safety trigger lock, comfortable non-slip cushion grip, fastener reload, all-steel working parts, and 14-amp motor.
   Details...

$56.95
Plastic pry tool, great for prying fasteners and seals, pushing seals into retainers, loosening fabric etc
$9.95
Arrow T-50 Stainless Staples, 1/4", 300 Count

 

$3.49
Arrow T-50 Stainless-Steel Staples 3/8", 300 Count
$3.49
Arrow T-50 Stainless-Steel Staples, 3/8", 1000 Count
$9.95
Arrow T-50 Stainless-Steel Staples, 1/4", 1000 Count
$9.49
Trimmer Contact Cement: 4-Oz. Brush Top Can. Strong, Waterproof, Flexible Bond for Vinyl-coated and Vinyl-laminated Fabrics.
$8.95
Trimmer Contact Cement: 8-Oz. Brush Top Can. Strong, Waterproof, Flexible Bond for Vinyl-coated and Vinyl-laminated Fabrics.
$12.95
Plastic pry tool set, 7-piece kit

Great for prying fasteners and seals, pushing seals into retainers, loosening fabric etc.

$26.95


Hydraulics

Hydraulics

Best Buy!
A PACKAGE SPECIAL:
Complete Convertible Top Hydraulics Kit, Use Automatic Transmission Fluid (ATF)

ALL PARTS COME WITH 1-YEAR WARRANTY TO THE ORIGINAL BUYER

  • One Motor Pump
  • Two Hydraulic Cylinders
  • One Hose Set
  • Hydraulics System Manual
$649.95
"O" Ring Motor Pump Service Kit For Any American Makes

Our O-Ring kit contains the following items:(1) Drive Pin, (1) 1/8" Chrome Ball, (2) 1/4" Chrome Ball, (2) Pump Port O-Ring, (2) Reservoir O-Ring, (1) Reservoir bolt O-Ring, (1) Reservoir plug, (1)Reservoir Plug O-Ring (metal plug only).

$24.95
1957-58 Buick Roadmaster 76C, Super 56C Convertible Top Hydraulic Cylinder, Each
$139.95
1957-58 Buick Roadmaster 76C, Super 56C Convertible Top Hydraulic Cylinders, Pair
$269.95
1957-58 Buick Roadmaster 76C, Super 56C Convertible Top Hydraulic Hose Set
$99.95
1957-58 Buick Roadmaster 76C, Super 56C Convertible Top Motor Pump
$279.95
Convertible Top Hose Clip, Fits: 1955-1972 GM Convertibles
$8.99
FLAT GROMMET FEET FOR EARLY MOTOR PUMP, 4 PIECES
$7.95
Hydraulic System Guide: A well illustrated 10 page, 8 1/2 x 11 guide to the operation, diagnosis, and bleeding of the motor pump and to the motor/pump and cylinder removal and reassembly. Diagnosis includes electrical testing procedures.
$14.95
Set of 4 New Pointed Pump Grommets
$7.95
Top Cylinder Mounting Bolt, One.
With Pin and Bushings
1 5/8" Long, 3/8" Diameter.
$11.95
Top Cylinder Mounting Bolt, One
With Pin and Bushings.
1 1/8" Long, 3/8" in Diameter.
$11.95
Top Cylinder White Nylon Bushing, Each
$2.95
Motor pump reservoir plug, black rubber
$1.95


Cleaning & Protectant

Cleaning & Protectant

A PACKAGE SPECIAL:
A Combination Pack of RAGGTOPP Brand Canvas Cleaner & Protectant.
  • Plus:
  • Raggtopp Convertible Top Plastic Window Cleaner and Protectant Kit.
  • The Natural Horsehair Convertible Top Cleaning Brush
$79.95
A Combination Pack of RAGGTOPP Brand Canvas Cleaner & Protectant

About RAGGTOPP products
$38.95
A PACKAGE SPECIAL:
A Combination Pack of the RAGGTOPP Brand Vinyl Cleaner and Protectant.
  • Plus:
  • Raggtopp Convertible Top Plastic Window Cleaner and Protectant Kit.
  • The Natural Horsehair Convertible Top Cleaning Brush
$79.95
A Combination Pack of the RAGGTOPP Brand Vinyl Cleaner and Protectant Together

About RAGGTOPP products
$34.95
Raggtopp Convertible Top Plastic Window Cleaner and Protectant Kit

Contains:

  • Bottle Window Cleaner
  • Bottle Window Protectant
  • Sponge, Applicator Pad
  • Microfiber Towel

About RAGGTOPP products
$30.95
Natural Horsehair Convertible Top Cleaning Brush

About Natural Horsehair Brush
$14.95


Latches

Latches

1957-60 Cadillac, Oldsmobile and Buick Convertible Top Latch Handles, Pair
$99.95


Important Information

Original Factory Color(s): Black and GM White

Original Configuration:The original topping was pinpoint vinyl. We offer these tops in pinpoint vinyl and in haartz stayfast canvas.

About The Materials:

Haartz Pinpoint Vinyl’s design is original to most American cars from the fifties to the nineties. Pinpoint refers to the little dots or pips that you see if you look closely at the vinyl surface. European cars, such as the old Beetles and others also used pinpoint vinyl as the topping fabric.

Haartz Stayfast Canvas has a canvas outer layer and a preshrunk cotton inner layer. The two are bonded with and separated by a butyl rubber core. It is this core that makes the fabric last a very long time, with both better static and dynamic wear ratings than vinyl toppings. Haartz Stayfast is the American substitute for the German canvases used in Mercedes, Porsche, BMW, some models of Mustang and Lebaron and others. Canvas is widely regarded as "richer looking" than vinyl. It is a little harder to clean. The inside of the top is pre-shrunk cotton. The inner lining is usually black. If you do not see a canvas top listed for your car, please inquire and we will provide a quotation for it.

Original Window:Tops are made with a plastic rear window.

About The Tops:These are classic two part tops. The rear window section (the "curtain") is joined to the main top at the bow above the rear window. Illustrated step by step instructions for performing this installation are contained in a chapter of the taylor upholstery handbook. We stock this book. You can go to the 'home' page and select 'book on auto upholstery' where you will find it described and offered for sale.

Boots:Convertible top boots are offered for these cars. We strongly suggest the use of a modern leather grained boot vinyl. These fabrics have a slight elasticity that makes the boot use much easier than boots made of topping fabric. Some cars require boot attachment clips. These must be transferred from the old boot or ordered separately, where needed.

Hydraulics:

We now stock hydraulic cylinders, motor-pumps, and hoses for your convertible tops. All are made to OEM specifications. Each can be ordered separately; however, when ordering hydraulic cylinders we recommend replacing both. The chances are that both hydraulic cylinders were manufactured at the same time: if one is on its way out the other may follow. If the top is raised and one hydraulic cylinder is working harder than the other the result over time can lead to a slightly bent convertible top frame. The replacement of both hydraulic cylinders will ensure that the top raises and lowers symmetrically.

Systems for this car take Automatic Transmission Fluid (ATF) and have a 1 year warranty when used with this fluid. Brake fluid should not be used as it voids the warranty. We also offer an installation manual when ordered.

The 12 volt motor-pumps include a mounting bracket with rubber grommets to reduce vibration.

We also offer a rebuilding service for motor-pumps. Not all are repairable, but it is less expensive to have one rebuilt than to buy a new one. The motor-pump would need to be sent to us for evaluation. Hoses come with all new fittings and are made specifically to fit your car.

CONVERTIBLE TOP FABRICS
Almost all manufacturers use Haartz fabrics. They may specify "heaviest weight" or "original replacement" in ways that seem reassuring. But they do not really tell the whole story. Please bear in mind that two things dominate, by far, the quality issue: (a) the manufacturing quality control in the factory that makes the top and (b) the care and thoroughness of the installation. There is a trade-off in weight: heavier is better for resisting tear through, but lighter is better for flexibility and abrasion from within that may arise from movement. Almost all our tops are a flexible medium density (36 oz.) fabric. Heavier is not better in most cases. Where it is, because of the top design, we will say so and the top will be made of the heavier vinyl.


Parts in this category (Buick Super 56C & Roadmaster 70C, 75C & 76C) fit cars for years: 1957 and 1958.