[RichardJ]

That is a Rochester B. Not a MonoJet.

What makes you think you need another kit?

There's something hinky about the way the choke cable clamp is positioned. I think there is something assembled wrong with the choke mechanism that may be causing the leak as well as the choke operation.
Unlike many carb chokes with a step cam, your choke has a tapered ramp for the high-speed idle.