Aluminum Holley 4 barrel double pumper carburetor Model #4010 ~ 750 CFM. List number R84011-1. This carburetor is ready to install on your engine. I could use a good cleaning, and maybe a rebuild kit could be installed but may not be necessary. This carb comes as photographed. Additional photos are available upon request. Thanks for taking the time to look at this item. If you have any questions, please don't hesitate to email me. Please contact the seller if you have any issues with this item before leaving any feedback.