Time to fess up.
 

Ok I'm an idot.
My rebuild has never run good at an idle. have done the carbs 20 times. No idle authority.
I am fitting new PMO manifolds as it must be a vaccum leak.
Been on this forum for 3 months to fix this.
So one last time to blow the carbs through. I can't for the life of find the circuit to idle screws. Yep must be blocked. Then the penny dropped.
Air idle and idle mixture screws are swapped. Bet it runs great now.
Lyndonhttp://forums.pelicanparts.com/uploa...1605932002.jpg

Duh.....
Happens to all
Bruce