right you will have to daisy chain vacuum tapes off each TB runner for MAP sensor and power brake booster if vehicle has one .
getting nice even idle will be big problem , same issues as with motorcycle engines .
What I would do is try an either find if your vehicle has a IM that has longer, thinner runners version available or if not maybe you can add a spacer (depending on how its made, multiple parts) to length runner length a bit.
this will lower sweet spot more for low to mid TQ which should help in eco conditions if car isn't already optimized for it .
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