thread and size of vacuum ports

[JeffP]

I have a "L" engine in my '69 Elan Plus2 with twin Weber 40DCOEs What size and thread is usual for the vacuum port outlet for the headlamp lift system?

There has also been a conversion to a servo on this car and I assume that the vacuum port for the servo will be the same size, or if different, what is it likely to be?

Many thanks

[mbell]

1/8" BSP which is very close to 1/8" ntp, so they often get mixed up.

[gus]

rear one is larger 1/4 BSPT I think

[gus]

or maybe not, looking at it yesterday I would have to take it out to check....

[mbell]

There both 1/8" BSP.