what jets, main, idle, air do you have in there now?
Neat thing about Weber carburetors is each circuit can be controlled. So almost all circuits have fuel and often air jets controlling them. Need to know what you have now.
If you have no idea on where they are located. Do a google for Teglerizer.com and Pierce manifolds. You should be able to pull up a parts diagram(schematic) that will show you where the jets are located.