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MGB Information

 

 

Back to Production Mods 1962 to 1967 1968 to 1970 1971 to 1973 1978 to End
      MGB Production Modifications, Dec 1973 - Apr 1977
Date Roadster
Chassis No.
GT
Chassis No.
Remarks
1994 Orin B. Harding (Last Revised: 24-May-94)

Dec-73

5-328101

5-328801

1974 model year

Dec-73

   

Began making changes to engine bay layout to make common with V8 - Completed changes at start of '77 model year (car # 410001)

Dec-73

   

Radial tires made standard

Dec-73

   

Automatic gearbox withdrawn - None sold in North America

Dec-73

   

Sequential seat belt system with buzzer and warning light added - N. America

Dec-73

   

GT withdrawn from California market - Continued to be sold in 49 states and Canada

Jan-74

5-338790

5-338560

First serial # this calendar year

Early 74

5-339095

5-339472

N. American spec cars fitted with large "Sabrina" vertical rubber overriders

1974

5-345042

5-342851

Late style side lift jack change point. Jack has flat top where crank arm attaches

 

5-347180

 

Alternator pulley changed from 2.75" Dia. (belt 35.5" long) to 2.375" Dia. withbelt 35" long

Aug-74

   

A.C. (US made) Fuel pump (BLM Part # 601010) approved as replacement of SU AUF 305 fuel pump

Sep-74

5-360301

5-361001

1975 model year - UK market

Sep-74

   

Rubber bumpers

Sep-74

   

Ride height increased

Sep-74

   

Energy absorbing steering column standard in all cars

Sep-74

   

Single 12 volt battery

Sep-74

   

Overdrive ratio changed from 0.8021:1 to 0.82:1

     

V-8 type engine mounts

Sep-74

5-360301

5-361101

1974 model year - N. American (except California) market

     

Twin Carburettor, no catalytic converter

 

5-363423

 

Seat belt interlock system deleted. Sequential light and buzzer retained

Dec-74

5-367720

 

1975 model year - Roadster - N. America (18V engine, Z-S carb)

Dec-74

 

5-367803

GT withdrawn from N. American market - No GTs sold as '75 models in US

Dec-74

   

Single Zenith-Stromberg carburettor - N. America

Dec-74

   

Catalytic converter - California specification cars

Dec-74

   

Servo assist brakes made standard for dual line system equipped cars - N. America

Dec-74

   

MG badges on front bumper, boot lid, and Centre of steering wheel now gold and black for 50th anniversary (1975 cars only)

Dec-74

   

MGB badge removed from boot lid

 

5-367902

 

Alternator fan belt changed from 35" long to 37.38" long

Jan-75

5-368090

5-369101

First serial # this calendar year

Apr-75

   

Hypoid SAE 90 oil approved for use in gearboxes (OD and non-OD) of all MG cars

May-75

   

"Jubilee Special" to commemorate MGs 50th anniversary. 750 cars built

Jun-75

5-380278

5-379495

Overdrive standard - UK Market

Sep-75

5-386601

 

1976 model year

Sep-75

   

Catalytic converter on all US cars

Sep-75

   

MG badges change back to silver and black

Jan-76

5-393763

5-394665

First serial # this calendar year

Jun-76

5-410001

5-410351

1977 model year

Aug-76

   

Front anti-roll bar thickened from .531" to .625"

Aug-76

   

Rear anti-roll bar standard

Aug-76

   

Fascia redesigned

Aug-76

   

Electric clock standard

Aug-76

   

2 speed heater fan

Aug-76

   

"Deckchair" seat inserts - UK market cars

Aug-76

   

Head restraints standard - All markets

Aug-76

   

Twin radio speakers in doors and radio aerial standard

Aug-76

   

Overdrive switch moved to gear change knob

Aug-76

   

Four spoked steering wheel

Aug-76

   

Steering lower geared (3.5 Vs 3.0 turns lock to lock)

Aug-76

   

Engine cooling system sealed with catch tank added

Aug-76

   

Electric radiator cooling fan ( 2 for N. America and Japan)

Aug-76

   

Engine bay now common with V8 layout (changes started at car #328101)

Aug-76

   

Petrol tank capacity reduced from 12 to 11 imperial gal.

Aug-76

   

New soft top (hood) with zip out rear window

Aug-76

   

Pedal positions altered to allow "heel-and Toeing"

Aug-76

   

Halogen Headlights - UK Market cars

Aug-76

   

Tinted glass - GT - All markets

 

5-415001

5-412301

Fuel pick-up made integral with tank level sending unit

 

5-417229

 

One piece speaker assembly with white plastic water deflector.

10-Sep-76

 

1-2903

Last MGB-GT V8 produced Note: Total V8 production of 2,591 is generally accepted with no explanation of difference between car # and total production given. There was apparently one additional MGB-GT V8 built to 1977 UK specifications after chassis #1-2903 and this car is now in private hands. Thus total production may have been 2,592 cars.

Jan-77

5-424748

5-422730

First serial # this calendar year

 

5-425297

5-422792

Fuel Pump changed from AUF305 to AZX1307

Apr-77

   

Inertia reel seat belts standard - All markets

 

5-437181

5-436465

Dual line brake system with servo made standard for UK cars. Note that change began at car 5-436465 and 69 cars between this number and 5-439568 could have either system fitted. See reference #12 for a listing of these cars.

 

Contents Copyright (C) 1998 - 2017 by O.B. Harding