you can contact clifford in corona ca their web site is www.cliffordperformance.com they have cams headers adapters for 2barrel carbs. there a bit expensive but its good stuff. i but dual outlet headers on with flowmasters and it sounds like and 8. i also but a webber 2barrel on and a pertonix system.
i bought everything from clifford. i had to get an adapter that goes between the manifold and carb bolts right in and then the carb goes on. im not sure what type of webber it is ill try to find out and get back to you. i also had to get a piece to extend the gas linkage. i bought it from clifford for like 20 bucks and then i looked at it and could have made it for 20 cents. clifford also recomendes that you get the headers first and then the carb thats what i did. clifford isnt the only place that has headers i believe headmen has some i would call summit and see what they got but i believe there about the same price.