A buddy-o-mine has a 31 Roadster with a sbc and 3 dueces. I timed it and set the dwell for him a week or so ago. I went back over there lastnight to try and fine tune the carbs, and although he is pickled tink about the way it runs, I don't think it's right. I tried tying the other two in for secondaries(mechanical linkage), and when running it and trying them it fell on it's face. What gives? I also noticed that the two outer carbs have idle mixture screws, I thought they are only secondary and son't need the idle mix screws. How should these guys be tuned? I've got good vacuum readings on the gauge, and it doesn't sound bad, just isn't quite right to me, but I've been told my head is crooked too, so it may just be me. All info is greatly appreciated.