New to straight 6 world--help with info on engine and carb

[4shongo]

Like the title says, I am new to the inline 6 world...this is my first one!! I have read a lot about the 230 and 250 engines but cant seem to find any numbers to help me identify which engine I have IN MY 1966 C-10 Service Truck. Where is the numbers located that will help me identify it? Also, I can see no numbers or name on the carb (I assume it is a Rochester 1 barrel). I need a rebuild kit and Auto Zone has one but I need to know what type carb this is. Also, looking for info on the small silver square part next to the carb (I assume it is some sort of heat riser during warmup, but not sure) it is not hooked up. And lastly the bracket under my carb that is not hooked up as well. Any info on these questions or anything else you can add would be appreciated. Thanks




WHAT IS THIS PART????