Hi,

Assuming your timing is okay and it's a vacuum leak, try this.... start the engine, and let it idle (even though roughly), get a can of carby cleaner and spray around the gaskets where the carby is bolted onto the manifold, and also where the inlet manifold joins the head. Also spray around the carby itself. If there is an air leak you will find the engine will suddenly increase in rpm when the carby cleaner hits the leak. If this happens then check that area for a leak (worn gasket, something cracked or has a hole, etc) and repair.

Remember that carby cleaner is highly flammable so don't spray it on the exhaust pipes, and make sure your spray is a short, accurate busrts as you check for vacuum leaks.

seeyuzz
river