Hi, so i just upgraded to a twin Weber DCOE 45 setup, and i want to cennect a vacuum timing advace/retard tube and there isint any hole where i could do it, and ive tried one hole ahere a screw is inserted, so i took it out, connected the tube and the engine started to rev'upto about 3000rpm. I've tried searching on the internet and nothing. So i was hoping that any guys might have that setup and could give me a photo of how they have done it, or tell me if i will have to drill a hole into my carb. Please reply fast. Btw its a 2.1 litre 4 cyl engine, with a ported head.