All that was done was the installation of headers,
The standard manifold has a part of it that bolts to the bottom of the inlet manifold to provide heat to aid fuel vapourisation and emmissions.
The carb has been overhauled, the guys that overhauled it say the problems (flat spot, gutless) are caused by lack of heat, I am interested to see how other people have gotten round this problem.
An XE weber is going on in a few months which will get rid of this problem but thats months away,
I am wondering how all the other people with headers and varijets have got around this problem