I am looking at some gt engine bays and came across this thing as identified in the yellow circle. It appears to be production standard otherwise it was a perfect fit for the factory threaded holes.

Does anyone know what this may be?

8TR external regulator for alternator.
Only early GTs have it.Later GTs still have the holes but no regulator. They use internal regulated alternator.

I'm not sure when it was deleted, Winabbey probably has a document saying when.

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That type of regulator was fitted to mini k coopers clubmans and gt's up to the end of 1971.

Service Bulletin says engine 1200/1014. Parts manual says YG2S8 1014.

Going by the photos I have I reckon it was engine 1200/1014 around car YG2S8 760 - 780

thanks. looks like a god pickup point for some headlight relays in today's case. Interesting in that Leyland decided to just leave the provisions there for all later clubmans. I have a 1973 so perhaps not so the case for later models to have these holes.

Body panels were pressed and then drilled in quantities that would last a given time, so holes for the regulator may have been in place for a short or long time depending on the stock at hand.

Just spoke to Peter Davis who tells me the large panels, such as turret and floor, were pressed in greater quantities because the set-up of the press and dies took longer than for a small panel. Some panels were drilled on the assembly line while others were drilled straight after pressing. Boot lids is an example of assembly line drilling as the badge holes differed across models.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43