Hello together! I am looking for information about the Weber double carburetor DCOE. There seems to be several types, e.g. I read from an Opel DCOE-9. What do these differ from ? Also I have heard of the Dellorto or other construction like should be (vage) ? I need 3 pieces for a row six, can you combine different ? Where can you get Venturis, nozzles etc. ? Thanks in advance Christian