There is a special Weber Tuning section here at Club Cobra.
http://www.clubcobra.com/forums/weber-tuning/
Your post over there will yield much better responses.
What you have is a huge lean spot at the point where the carb transitions from the idle to the main circuit.
On the Webers all driving, basically up to 2500 rpm is done on the "idle" circuit.
You already have done one important step, getting the LM-1 - a great tool.
Read up on the topics in the Weber section - that will help you understand your Webers and tune them to perfection.
I was where you are now some months back - now I have great running carbs and the know how to tune them.