carbs

[John Mason]

I have also read all the threads on your carb problems and when you say it revs when your hand is placed over the carb throat it makes me think that for one reason or another it is caused by an imbalance of petrol/air mixture. Check you have the correct jets for your car ( the same carb will probably be used on one or more engines with different jets for each.) check they are clear and allow full flow of fuel. Although you have already checked for air leaks in the manifold check again by putting a small amount of carb cleaner against all manifold mating surfaces and if it picks up and revs then it will show a leak there.
I know this is all frustrating but I am sure it is something easy to fix if we can put our finger on the cause.
My trusted fault finding in Oldhams Automotive Engineering Illustrated list the following for your problem
1. Damp or faulty condenser
2. Faulty coil
3. Plug insulation defective, soothed up or gap to wide
3. Ignition too retarded
4. Jet blocked
5. Shortage of petrol
6. Choked exhaust.

I realise from reading your thread you have already checked on some of these already.
I hope this may help you before you have to give up. Remember it could be more than one thing that is causing the problem.

John Mason