What I have is a 2.8L inline six with 10.3:1 CR, ported / polished head, Big Isky Cam, headers, Total Seal, Etc. Just a massaged NA weekend warrior.
All 3 carbs and 6 tubes are very well matched. Using a "snail gauge" they flow the same, all rebuilt by me (lovingly), idle mixture set well. Just the transition from idle to mains is ****ty.
The progression circuit doesn't kick in till too late due to the location the first hole. I thought I read that you guys with the Cobras had the same issue so this is why I am here bothing you V8 guys with my little inline 6.
However I think there is a lot we can teach each other about Webers from different motors.