Weber swap

[swet158]

I really appreciate all the info. The port I’m talking about is between the two carb mounting bolt holes closest to the head. Looking at the stock carb, it looks like a vacuum port.

[swet158]

I threaded the bottom hole and I’ll be getting a plug.

[SubGothius]

I really appreciate all the info. The port I’m talking about is between the two carb mounting bolt holes closest to the head. Looking at the stock carb, it looks like a vacuum port.

Aha, that's the jet-valve port, only works with the stock carb and does nothing at all (good nor bad) with a Weber swap. No need to do anything with it as I think the adapter plate blocks it, but you may as well at least remove the lash adjuster screws that operate the jet valves, effectively disabling them, or even get a jet valve eliminator kit to replace them entirely. You'll find those lash screws on the same rocker arms that operate the main intake valves.