Mine has a 7033676 on the base,703383 on the back, in the circle on the side it has 7262 penciled in. I rebuilt this carb and it ran my engine before I pulled the drive train. Other than that all I know is that this carb was on my #s matching 67 400 conv a/c 400 auto with yt 400 and 670 heads. any other questions give me a call352-318-3604.