The example you give sounds right for cold start. The throttle blades get held open a little extra to raise the RPMs when the engine is cold. As the coil in the electric choke warms up, it will begin to open the choke and to allow the Fast Idle to step down. When the choke is fully open, there wont be a Fast Idle and the throttle blades should close all the way to your Base Idle setting.The modified bracket from the holley work fine but when I put the choke piece on it wants to like stop in the middle of when I'm pressing on the throttle.
Example:I press on the throttle and the car goes all the way wide open throttle then just stops in the middle when returing back, It doesn't return all of the way back. This is with the carb off of the car!