[ack fia]

You may want to look at the needle and seats. I'm told that the latest Weber pieces have a tendency to leak. I'm waiting for Cal Metal to tell me he has more of the "better ones". I also was able to get rid of the leakage by keeping the fuel pressure under 3 lbs.
My setup is :
Idle 60 / 120
Mains 145 on F7
Air correctors 195
Pump and bypass 50 / 50
The engine is a very mild 302