Help please I think I'm missing something

Hello all I’m firing 600 bike carbs to my 1.8 kr iv got the rest sorted but can’t understand where the vacuum from the brake servo is meant to go there’s no fitting in my manifold it’s a bog brothers one so was custom made is there another place for it or do I need to drill and tap a fitting into the manifold surely  they would have done this when making it just wanted to check thanks . 

Did you have the manifold made?

As they are custom they will make what is asked for.

Short answer is yes, if you need a vacuum feed you'll need to drill and tap the manifold and put in a feed.

Or use an electric vacuum maker something like this https://www.ebay.co.uk/itm/12V-Vacuum-Pump-Kit-Brake-Booster-Electric-Vehicle-Hotrod/192877251317?hash=item2ce8614af5:g:FDsAAOSwwZxcCUTU

Probably don't need the entire kit, but not sure. It's something I heard about and I've never done it.

Ian

If you can find the brake check valve out of a later 1.8 Cabriolet they have the additional ports that you require for the Vacuum.

I like the suggestion of an electric vacuum pump, already suggested. Its what i was thinking of doing when fitting jenveys, because advice i received thought  one runner would not provide enough vacuum.

Perfect thanks all it’s grate to get some other ideas for a solution the forms rule one more .