thread size cylinder head vac take off point

[bloodknock]

Hello out there,
can anyone advise me of the thread type and size of the vacuum take off points on the inlet of a Sprint cylinder head please?
thanks
Bob

[mbell]

1/8 ntp or bsp, which it's correct is open to debate but they close enough that either fitts.

[rgh0]

It will have originally been BSP but could be anything now depending on what has been screwed in over the years

cheers
Rohan