I am about to put two Dellorto DHLA 40H carbs (like Weber DCOE) in my '87 E30 M10B16 BMW (Pierburg 1B2 is not cooperative :-).
I now have vacuum advance connection from the distributor to the carb. Where to connect that hose now? There is no constant vacuum anywhere? Will I have to drill 4 holes in inlet manifold connect them, and take vacuum from there? Will that have any negative effect ?