From what I gather you have a mismatch of carburetor and intake with missing parts on both. The carburetor is not designed for the kit from summit. It is designed for the divorced choke setup in the pictures I posted . The choke spring is mounted in the intake in a horizontal chamber and the linkage rod comes straight up from that to the choke linkage on the carb, which is missing on your carb. See my pics above.
Here is another one.
Here is a kit from Edelbrock I found on EBay
Your intake is made for a thermostat coil and it comes out of a slanted chamber and goes to a linkage on the side of the carb which you don't have and is similar to the above type. It is slightly different from the top picture. Notice the wire on the bottom of the picture with the screw. It is a manual choke wire.
The newer style has a heat tube which I believe comes off of the exhaust manifold to a black coil, It resembles the electric choke on the newer carbs.
The kit you saw from Summit is made to replace it and it uses electric current to heat the spring and release the choke. You drill out the rivets and pull the spring out then install the electric kit with the screws then hook up the linkage and wire it to 12 volts key on source.
This picture shows it and the red cap is where the heat tube would connect if you had one.
The easiest solution would be a manual choke kit if the vehicle runs great. If not then I would just find a carb with the electric choke and change it out.