[Healeys] SU HD6 carbs

[simon.lachlan at alexarevel.plus.com]

I have three HD6s in my car. When I bought them from a place that renovated
Jag Mk IIs I didn't notice that 2 of the carbs have 2 shoulders on top of
the dashpot whilst the third has only one.

They work perfectly well in concert and I have no worries about function.
However, it's begun to irritate me and I've been looking for one on eBay.

So, tell me...which is the most common version..two shoulders or one? 

Thanks,

Simon

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