Well I've replaced the carby gasket and nipped it up nice and tight. I also replaced the rubber vacuum blanks, and the cracked hose to the brake booster. Still no joy with the stalling at idle
I have adjusted the accelerator pump better - no bog on take off now.
The carby came with the 75 jets already installed - just too lazy to change them. Swapped them back for the 70's from the VS today.
One thing I noticed today was when I tried to hook up the vacuum gauge to the vacuum port the PCV hooks to at the bottom rear of the carby. The idle immediately dropped and stalled. Hooking back to the PCV made it idle better.
Could it be a faulty PCV valve?