Installed a edelbrock 1406 carb on 400 small block Chevy where do you hook up the transmission kickdown cable?

The Edelbrock 1406 carburetor doesn't have a provision for a transmission kickdown cable. The 1406 is a manual choke carburetor, designed for simpler applications without the need for automatic transmission kickdown control. Automatic transmission kickdown is usually controlled by a separate linkage or modulator connected to the throttle body or transmission.

Therefore, you'll need to find a different solution for your automatic transmission's kickdown. This typically involves:

* Using a separate kickdown linkage: Many aftermarket kits are available to connect the transmission's kickdown cable to the throttle linkage, independent of the carburetor. This is the most common solution.

* Adjusting the existing throttle linkage: You might be able to modify your existing throttle linkage to accommodate the kickdown cable, but this requires careful adjustment and understanding of throttle and kickdown cable function. It's generally not recommended unless you have experience with carburetor and linkage adjustment.

In short: Don't try to connect the kickdown cable directly to the Edelbrock 1406. It's not designed for that. You need a separate kickdown mechanism or linkage. Consult a carburetor installation guide or a qualified mechanic if you are unsure how to proceed. Improper adjustment can lead to poor transmission shifting and potential damage.