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MG MGA - Lucas Distributor Info for 40718A 23D4 ?

Hi Guys.

I have one of these distributors which is missing the base plate.

Firstly does anyone know what the lucas part number is for the none vacuum advance base plate?

I know the "With" Vacuum advance base plate part number is 422318

Perhaps someone knows where I can get one of these too?

If it helps this is for a twin cam

Cheers
Mark
Mark Hester

Mark. This fellow claims to have base plates available:
http://www.distributordoctor.com/contact.php on his website. Jeff Schulmer (sp?) has a distributor rebuilding operation here in the US and may be able to help in your search. Someone should be along to post his website address. E-mail to both might be worthwhile.

Is there any difference between the points plates on the vacuum advance equipped models and the non-vacuum advance equipped models? I have only seen the former myself. But, considering the fact that Lucas made one basic model of distributor at a time, I wonder if the points plates were the same for both the vacuum and non-vacuum versions?

Les
Les Bengtson

Les -
Vac (25D) dist has a two piece plate, such that the upper bit rotates on the lower to change timing, 23D is one piece.

Mark -
You can just braze the two piece plate together at the center spigot to replace the solid plate. Center the plate in its travel before brazing.

Fixed plate is #54410498 OE, but beware - Lucas loved changing/superseding part numbers back in the 60-70s! Or the dist itself may have been changed to a later one - Cooper S or early 1275 Spridget are most common.
Later replacement plates tend not to have the pivot post for the points, after they went to the "Quikfit" type points (mid/late 60s), and these will have different numbers also.

FRM
Fletcher R Millmore

Definitely talk to Jeff Schlemmer at www.advanceddistributors.com - he does wonderful rebuilding work, and has a large stash of parts.
Mark Lambert

This thread was discussed between 26/05/2010 and 27/05/2010

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