Best Alternator for '78 Roadster

Roger Searle

Hi All,

I'm replacing the Lucas 18 ACR alternator in my '78 Roadster.  Does anyone have a recommendation on whether or not to replace it with another Lucas part or other manufacturer.  I want to be sure it fits the mounting brackets and the electrical plug.  I did some research and discovered even the Lucas units have different plugs for different chassis number groups.

No need to increase amperage since the car is pretty much original so no extra draw.


1978 MGB Roadster
1971 MGB GT

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