I'm progressing well with the ITB manifold for the E Type, I'm now thinking about the servo take off.

I could use a single barb on one of the runners, but, I have a vacuum point on each runner, which will be linked together via a 15mm tube for MS MAP, and for the vac gauges to balance the bodies.

Question is could I run the servo off these too, each take off is 3mm bore, my thoughts:

Standard jag single take off from the plenum is 7mm bore giving an area of 38.5 mm sq, I have 6 take offs at a combined area of 42.4 mm sq.

Would I have sufficient air flow for the servo? the car does have a vacuum reservoir too.

Om my Mx5 V6 I run a single vacuum lime from one `body to the servo , with the other 5 blanked off - and the brakes are fine

You can run the vac to a manifold then distribute from there?