16v carb help

[InfamousAdam]

Okay this will be a long post. I recently got a 84 gti with a 16v 2l swap. Now this engine ran carbs from 2 owners ago the previous owner was going to run carbs again and did not have the time for it. A friend picked it up for parts and in bought it from him. Now I picked up a set of weber dcoe 40 with the manifold adapter there is Holley fuel reg along with a Holley fuel pump which I was deciding on changing over to a carter. Now I don't know what carbs he ran but he had both outlet valves hooked up on the reg and nothing to the return along with a hookup for a icm. There is nothing for the spark advance that i can see but he has a Bosch coil that is wired up to the icm and then over to the distributor. The water neck doesn't look like its in the way but I will replace that. Also for the brake booster what do I do about the hook up since there will be no vacuum. I have attached pics the best I have please help and if you have questions I will answer the best I can

[antichristonwheels]

you need to drill manifold runner #4 for the brakes.